If your 3D print isn't sticking to the bed, the cause is almost always one of four things: a dirty bed, the wrong Z-offset, the wrong surface, or filament that needs a different adhesive strategy. Here's how to fix each.
A 3D print that won't stick to the bed almost always traces back to one of four things: a bed that has invisible oils on it, a Z-offset that's too high, a build surface mismatched to the filament, or a material like PETG or ABS that wants extra help (an adhesive, a heated chamber, or a different surface entirely). The good news is that the fixes are cheap, fast, and ordered. Start with cleaning. Most adhesion problems end there.
This article walks through what to try in order, with the specific numbers and surface choices that actually work for each filament.
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Quick summary
The four fixes that resolve almost all bed adhesion problems, in order:
- Clean the bed with 99% isopropyl alcohol. Skin oils from a single fingerprint are enough to make a print pop loose.
- Re-do your Z-offset with the paper test. A first layer that's even 0.05 mm too high will not stick.
- Match the surface to the filament. PEI for PLA and PETG, garolite or PC sheet for nylon, painter's tape on glass for ABS without an enclosure.
- Add a chemical assist for stubborn materials. Glue stick for PETG (also acts as a release agent), Magigoo for ABS / ASA, hairspray as a cheap fallback.
The rest of this article unpacks each, in order, so you can stop at the one that fixes yours.
Why won't my 3D print stick to the bed?
The first layer is the entire foundation of a print. If it doesn't grab the bed within the first few seconds of extrusion, every subsequent layer pulls on a part that has nothing anchoring it. Eventually the part lifts, slides, or the nozzle catches the edge and turns the print into a tangle of plastic strings.
Three physical things have to be true for a first layer to stick:
The plastic has to be squished slightly into the texture of the bed. This is what your Z-offset controls. Too high and the plastic lays in loose round noodles that don't bond. Too low and the nozzle drags through the plastic, leaving gouges and starving subsequent layers.
The bed surface has to be chemically clean. Oils, dust, mold release, and even the residue from your last print's adhesive layer can prevent a fresh print from grabbing. PEI especially loses adhesion over time as oils transfer from your fingers each time you handle a part.
The filament and surface have to be compatible. PLA sticks aggressively to almost everything. PETG can bond too aggressively to bare PEI and rip chunks of it off when you try to remove the part. ABS hates cold air and shrinks away from the bed if anything cools it during printing.
If you understand those three, the fix list below is just a checklist of how to satisfy each one for your specific situation.
How to fix a 3D print that isn't sticking to the bed
These are listed in order of how often they're the actual culprit. Most adhesion problems clear up in the first one or two steps.
1. Clean the bed properly
If you fix only one thing, fix this. The single most common cause of bad bed adhesion is invisible contamination on the surface. Skin oils, hand lotion, dust, the leftover residue from glue stick or hairspray, even cooking grease drifting through a kitchen-adjacent workshop — all of it kills adhesion.
The cleaning routine that works on every common surface:
- Remove the bed if it's a flexible plate. If it's not removable, let it cool to room temperature.
- Soak a paper towel or microfiber cloth with 99 percent isopropyl alcohol. Drugstore 70% works in a pinch but evaporates more slowly and leaves more residue.
- Wipe the entire surface in a single direction. Don't scrub in circles — that just smears oil around.
- Flip the towel and wipe again with a fresh section.
- Let the bed air-dry completely before re-installing.
Do this between every print or two. PEI surfaces, especially, lose adhesion gradually as oils accumulate. People who say "my PEI sheet doesn't work anymore" almost always have a bed that's never been properly cleaned.
A deep clean once a month: warm soapy water in the sink (PEI sheets are dishwasher-friendly on a low-heat cycle, but check your manufacturer's instructions). Soap removes oils that IPA alone can't fully strip. Rinse thoroughly, dry completely, then do a final IPA wipe before the next print.
What not to clean PEI with: acetone, brake cleaner, or any solvent strong enough to dissolve the PEI itself. These leave the surface looking clean but chemically destroyed.
2. Re-do your Z-offset with the paper test
Your Z-offset is the gap between the nozzle tip and the bed when the printer thinks Z = 0. A correctly set Z-offset squishes the first layer of plastic into the bed enough to bond, without pressing so hard it leaves nozzle drag marks.
The paper test is the universal calibration that works on any printer:
- Heat the bed and nozzle to your normal print temperatures. Beds and nozzles thermally expand a small amount; calibrating cold gives you the wrong number.
- Put a single sheet of regular printer paper between the nozzle and the bed.
- Lower the nozzle until the paper has slight resistance when you slide it — you should feel friction, but the paper should still move without tearing.
- Save that as your Z-offset and run a first-layer test print.
A correctly set first layer looks slightly translucent where the lines press against the bed, with adjacent lines touching but not overlapping. If you can see gaps between lines, your Z is too high. If you see ridges where lines pile on top of each other or visible nozzle scrape marks, Z is too low.
Most printers let you live-tune Z-offset during the first layer. Watch the very first lines extrude and adjust in 0.025 mm steps until they look right. Save the adjusted offset; this is the single highest-leverage habit in 3D printing.
A common mistake: setting Z-offset by eye on a cold printer. Beds expand by 0.05–0.15 mm when heated to 60°C. A "perfect" cold offset becomes 0.1 mm too low at print temperature, which means the nozzle drags through the first layer.
3. Match the build surface to the filament
Different surfaces work better for different materials. The wrong combination causes adhesion problems no amount of cleaning or Z-tuning will fix.
| Surface | Best for | Avoid for | Notes |
|---|---|---|---|
| Smooth PEI | PLA, PETG (with glue release), TPU | Bare nylon | The default for most modern printers. Cleans easily. PETG bonds aggressively without a release layer. |
| Textured PEI | PLA, PETG, ABS | Very small parts | Powder-coated finish hides scratches and gives a satisfying texture to the print's bottom. Releases parts when cool. |
| Glass with adhesive | ABS, ASA, large flat PLA | TPU | Perfectly flat. Needs glue stick, hairspray, or Magigoo PP adhesive. Cleans easily. |
| Garolite (G10) | Nylon, polycarbonate | PLA, PETG | The only surface nylon reliably grabs. Won't work for most other materials. |
| PC sheet | Nylon, PC blends | PLA | Polycarbonate build surface — softer than PEI, better for engineering plastics. |
| Painter's tape | ABS without enclosure | Anything else if you have PEI | The classic budget surface. Replace tape every 2–3 prints. |
If you're printing PLA on a stock printer's textured PEI sheet and parts pop loose, the surface isn't the problem. Skip back to step 1 (clean) and step 2 (Z-offset). The surface choice matters when you're trying to print a material that doesn't bond to your default surface, not when you're chasing the last 5% of adhesion on PLA.
4. Add a chemical assist for stubborn materials
Some filament and surface combinations need a deliberate adhesive layer. The right one depends on what you're printing.
Glue stick (PVA-based, like Elmer's Purple). The most flexible option. It boosts adhesion when needed and acts as a release barrier between the part and bare PEI. A Elmer's Disappearing Purple glue stick costs almost nothing and lasts forever. Apply a thin, even layer to a clean bed at room temperature. Reapply every 3–5 prints. Critical use cases:
- PETG on bare PEI — glue prevents PETG from ripping a chunk of PEI off when you remove the part.
- Tall PLA prints with small footprints — adds insurance against late-print warp.
- Any first-layer-only print where you want easy removal.
Hairspray. A budget alternative to glue stick. Aqua Net Extra Super Hold (in the purple can) is the canonical choice — high in copolymer, low in oils. Spray a thin layer on a cold bed, let it dry, and print. Works well for ABS, OK for PLA. Doesn't work for nylon. The downside: hairspray drifts onto every other surface in your workspace if you spray near the printer, so apply with the bed removed.
Magigoo original 3D print bed adhesive. A purpose-built adhesive that comes in formulas for different materials. The original works for PLA / PETG / ABS, and there are variants for PC, nylon, and PP. Applies like a glue stick but releases more cleanly. The most expensive option, but reliable. A single bottle lasts 6+ months for a hobbyist.
painter's tape blue 3 inch wide. The original budget bed surface. Apply tape strips to a clean glass bed with no overlaps and no gaps. Wide strips reduce seams. Replace every 2–3 prints. Works particularly well for ABS without an enclosure — the tape fibers give the plastic something mechanical to grab.
A note on overdoing it: applying a thick, uneven layer of any adhesive is worse than applying nothing. The first layer ends up squished into a goopy mess that doesn't bond evenly. Whatever you apply, apply thin and let it dry.
5. Tune the first-layer print settings
After cleaning, Z-offset, surface, and adhesive, the next-most-leveraged change is the slicer's first-layer settings.
- First layer height: 0.2–0.3 mm. Higher than the rest of your layers. This gives the first layer more thickness to absorb bed irregularities. A first layer at 0.1 mm leaves no margin for error.
- First layer line width: 0.5–0.6 mm (for a 0.4 mm nozzle). Wider lines push more plastic into the bed texture and bond more reliably.
- First layer speed: 15–25 mm/s. Slow first layers extrude more accurately and have time to bond before the nozzle moves on.
- First layer fan: 0%. Fan blowing on the first layer cools the plastic before it bonds. Turn the part fan off until layer 2 or 3.
- First layer temperature: Same as your normal print temp, or 5°C hotter. Some slicer profiles ship with cooler first-layer temps; that's wrong for adhesion.
These are slicer-side settings that take a minute to adjust and stay set. If a print fails to stick despite a clean bed and correct Z-offset, check that fan-off-on-first-layer is actually configured. It's the single most common slicer mis-setting.
6. Increase bed temperature
Higher bed temperature keeps the first few layers warm enough to bond. Manufacturer recommendations are conservative; try the upper end of each range:
- PLA: 60–65°C
- PETG: 70–80°C
- ABS / ASA: 100–110°C (and ideally an enclosure)
- TPU: 50–60°C
- Nylon: 70–90°C (depends heavily on the brand)
Above the ranges above, you risk "elephant's foot" — the bottom layer squishing outward as the plastic stays soft for too long. If you're already at the top of the range and still seeing adhesion problems, the cause is somewhere else (bed cleaning, Z-offset, or filament-surface mismatch). Don't keep raising bed temperature past these numbers.
7. Build a brim or raft
A brim is a single-layer, wide skirt directly attached to the bottom of your print. It increases the surface area in contact with the bed without adding meaningful print time or material. A raft is a thicker, multi-layer base the print builds on top of, which is heavier but stronger.
- Brim: Use 5–10 mm wide for tall narrow prints. The default for most adhesion-borderline situations.
- Raft: Use only when a brim isn't enough. Rafts add time and waste material, but they save prints with very small footprints (like a single tower or a delicate model with thin contact points).
A brim is one of the cheapest fixes available — it costs maybe 30 seconds of print time and almost no plastic but converts a 50/50 print into a near-certain success. Default to enabling a brim on any tall print.
What you may need
A short list of products that genuinely help with bed adhesion. We earn a small commission if you buy through these links at no additional cost to you.
- 99% isopropyl alcohol. 99 percent isopropyl alcohol — your most-used adhesion tool. A pint lasts months.
- Lint-free cleaning cloths. lint free microfiber cleaning cloths — paper towels work, but microfiber doesn't shed fibers onto your clean bed.
- A glue stick. Elmer's Disappearing Purple glue stick — the canonical 3D printer glue. Works for PETG release and adhesion boost on most other materials.
- Magigoo for stubborn materials. Magigoo original 3D print bed adhesive — the original works for PLA/PETG/ABS. There are dedicated formulas for PC and nylon.
- A spare PEI sheet. textured PEI build plate — sized for your printer. Old PEI sheets eventually scratch enough to fail; rotation is normal maintenance.
- Wide painter's tape. painter's tape blue 3 inch wide — for ABS without an enclosure or as a temporary fix on a damaged build surface.
How to prevent bed adhesion problems
A few habits that pay off long-term:
Don't touch the build surface with bare fingers. Handle PEI sheets and glass beds by the edges. Even clean hands leave skin oils that compound print after print. If you have to touch the surface, plan to wipe it down before the next print.
Re-level / re-mesh after physical changes. If you've removed the bed, swapped a build plate, changed a nozzle, or moved the printer, re-run the auto-bed-leveling routine. The mesh probably hasn't actually changed much, but a five-minute calibration is cheaper than a failed eight-hour print.
Replace flexible build plates when they're worn. A textured PEI sheet that's been printed on for a year develops scratches, dents, and worn spots. The texture starts losing adhesion in those areas. Rotation is part of normal printer maintenance — keep a spare on the shelf.
Print a first-layer test before any long print. A small "first-layer test" gcode that prints a 5×5 cm grid takes 90 seconds and tells you whether your bed is dialed in before you commit to a 14-hour print. Most slicers ship with one.
Why ABS, ASA, and Nylon need extra effort
Some materials are dramatically harder to keep stuck to the bed because they shrink as they cool.
ABS and ASA shrink about 0.8% as they cool from melt to room temperature. If any part of the print cools faster than the rest (because of a nearby fan, an open window, or just being a thinner section), it shrinks first and lifts the corner off the bed. The fix is an enclosure that keeps the air around the print warm. A passive enclosure (just a box around the printer) is enough for small parts; large parts may need active heating. Without an enclosure, ABS adhesion is a constant battle and you should consider switching to ASA or to PLA+ for that print.
Nylon doesn't shrink as dramatically as ABS, but it absorbs moisture so quickly that even fresh-from-the-bag spools can already be wet. Wet nylon doesn't stick to anything because the steam disrupts the bond. Dry nylon for 8–12 hours at 80°C and print directly from the dryer. Garolite (G10) sheet is the only surface that reliably bonds with nylon, and even then most slicers recommend a glue layer.
Polycarbonate is similar to ABS in shrinkage, plus it requires very high bed and nozzle temperatures and a strong enclosure. PC is rarely the right choice for hobbyist printers without a heated chamber.
If you're trying to print one of these materials on a printer designed for PLA, that's the most likely answer for your adhesion problem. The fix isn't more glue — it's either upgrading the printer (enclosure, higher bed temp, all-metal hotend) or switching to a material your printer is built for.
FAQ
Why won't my first layer stick even after I cleaned the bed?
If cleaning didn't fix it, the next-most-likely cause is Z-offset. Beds and nozzles thermally expand when heated, so a Z-offset set on a cold printer is too low when the bed reaches 60°C. Re-do the paper test at full operating temperature, then live-tune the first layer in 0.025 mm steps as it prints. After Z-offset, check that the part fan is off on the first layer — fan blowing on freshly extruded plastic prevents bonding.
Should I use glue stick on PEI?
For PETG, yes — glue stick acts as a release barrier so PETG doesn't bond so aggressively that it tears chunks of PEI off when you remove the part. For PLA on a clean PEI sheet, no — it's not necessary and adds residue. The exception is very tall PLA prints with small footprints, where glue gives a margin of safety.
What's the best build surface for 3D printing?
For most users printing PLA and PETG, textured PEI is the default and works well. For ABS, glass plus glue stick or hairspray works inside an enclosure, or textured PEI also works. For nylon, garolite sheet. There is no single "best" surface; the right answer depends on what you print most. If you're 90% PLA, textured PEI is the answer.
Can I print without a heated bed?
You can print PLA without a heated bed if you use a heavy adhesive layer — painter's tape with glue stick on top, for example. Anything else (PETG, ABS, ASA, nylon, TPU) requires a heated bed. Some printers ship without one for cost reasons; this limits you to PLA and limits print sizes.
Why does PETG stick too well to my bed?
PETG bonds covalently with bare PEI when both are hot, and the bond can be strong enough to pull a layer of PEI off when you remove the part. The fix is to apply a thin layer of glue stick or hairspray as a release barrier. The glue prevents direct PETG-to-PEI contact while still letting the print stick well enough to print cleanly. Let parts fully cool before removing — PETG releases on its own from glue-coated surfaces as the bed cools.
My first layer looks fine but parts pop off mid-print. What's happening?
This is almost always thermal warping rather than first-layer adhesion. As tall prints cool unevenly, the cooler outer corners shrink and lift the bottom away from the bed. Common with ABS and large PLA prints in cold rooms. Fix: enclose the printer (even loosely), raise the ambient temperature, slow the part fan, and add a 5–10 mm brim. The first layer was fine — the print just outran what your bed can hold against shrinkage.
How often should I clean my build plate?
Light IPA wipe between every print or two. Soap-and-water deep clean once a month. If parts start popping loose on prints that were working fine yesterday, the answer is almost always a missed cleaning, not a deeper problem.
Is hairspray better than glue stick?
Glue stick is usually better. Hairspray works fine but spreads fine droplets across everything in your workspace, leaves a sticky film on the printer over time, and is harder to apply evenly. The cost difference is small. Use hairspray only if you happen to have it and don't have glue.
If your bed adhesion problem doesn't match any of the cases here, snap a photo and run it through the WhyItFailed AI diagnosis tool. The free first diagnosis examines the specific failure pattern and tailors fixes to your exact printer, surface, and filament. Often the answer is a quirk of a specific printer or build plate that no general guide can cover.