Nozzles & Plates
When prints will not stick to the plate
The first cause is free to fix and it is the right answer most of the time. Work down the list rather than straight to a purchase.
By Michael W. · Published October 5, 2026
Work through this in order
- Wash the plate with dish soap and hot water. Skin oils are the cause most of the time. Not isopropyl alcohol as the primary method — it dissolves oils and redeposits them in a thinner film.
- Check the Z offset. The first layer should be visibly squashed into the surface, not sitting on top of it as round beads.
- Check bed temperature against the filament profile. Too cool and nothing holds.
- Add a brim on tall parts or small footprints.
- Then suspect plate wear. If a proper wash does not restore adhesion, the surface is done.
Steps one through four are free. Do all of them before buying a plate.
1. Skin oils, which is the answer most of the time
PEI adhesion is a surface-chemistry effect, and a film of oil from your fingers defeats it completely in that spot. One handling of the print surface is enough to create a patch where prints will not stick.
The fix: wash the plate in the sink with dish soap and hot water, rinse, dry with a clean cloth, and handle it by the edges afterwards.
Why not alcohol: isopropyl dissolves the oil and then, as it evaporates, leaves it redistributed as a thinner film over a wider area. It is useful for removing a specific spot of residue and it is the wrong tool for restoring a whole plate.
The habit that prevents it: handle the plate by the edges, every time. It is the cheapest print-reliability improvement available.
2. Z offset
Look at the first layer under a light. Correct looks like flattened ribbons fused to each other with no gaps. Too high looks like separate round beads sitting on the surface, barely touching. Too low looks like a smeared, ridged surface where the nozzle is plowing.
Too high is what causes adhesion failures. Nudge the offset closer and re-test on a small first-layer patch rather than a whole print.
Note that swapping plate brands changes effective Z offset, because PEI thickness and coating vary. If adhesion broke the day you fitted a new plate, this is why.
3. Bed temperature and material
| Material | Usual adhesion issue | First fix |
|---|---|---|
| PLA | Rarely fails — if it does, the plate is dirty | Wash the plate |
| PETG | Can stick TOO well on smooth plates and damage them | Use textured; consider a release agent |
| ABS / ASA | Corner lift from contraction | Hotter bed, brim, pre-heated chamber |
| TPU | Sticks hard to textured PEI and tears it | Use a smooth plate |
| PC / nylon | Needs a hot bed and dry filament | Dry the filament first |
| Filled (-CF / -GF) | Generally fine, but abrasive to the nozzle | Check nozzle wear, not adhesion |
The useful diagnostic: if PLA will not stick, it is the plate. PLA is the most forgiving material there is, and its failure points at contamination or Z offset rather than anything exotic.
4. Geometry
A tall part on a small footprint has very little area resisting contraction, and it lifts at the corners first. A brim adds area and is nearly free. On ABS and ASA, use a generous one.
This is also where the line between "not sticking" and "warping" blurs — warping diagnosis separates corner lift from layer splitting, which have different causes.
5. Plate wear, which is real but last
PEI is a consumable and it does eventually stop working. The signal is specific: a plate that no longer holds prints after a proper soap-and-water wash. Before the wash, you do not have evidence of wear — you have evidence of contamination.
What shortens a plate's life: skin oils, metal scrapers, and TPU gripping textured PEI hard enough to tear it. Looking after a textured plate.
Where to go next
Which plate to buy if yours is worn. Textured vs smooth if the material is the issue. Print quality triage if the first layer is fine and something else is wrong.
What to buy
Stock photograph of this product class, not of this specific unit.
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1. The replacement when a plate is actually worn
Bambu Lab Textured PEI Plate
Powder-coated texture on a 0.5 mm steel base, forgiving enough to hide a slightly wrong Z offset.
If a proper soap-and-water wash does not restore adhesion, the PEI surface is worn and this is the replacement. Textured PEI is the forgiving option, which matters when adhesion is the problem you are solving.
The 0.5 mm stainless base is specifically cited as resisting warping on large models in ABS, PC and nylon, which is the other half of an adhesion story on big flat parts.
What it gets right
- Powder-coated texture grips hard without glue stick and releases when cool, which is the whole job
- The 0.5 mm steel base is stiff enough that it does not lift at the corners under a hot bed
- Hides first-layer imperfections, so a slightly off Z offset is forgiving rather than a failure
What it does not
- The texture transfers to your first layer — wrong plate for anything whose bottom face is a show surface
- PEI surfaces are consumable; skin oils and over-aggressive scraping both shorten their life
- TPU can grip hard enough on textured PEI to tear the surface on removal
| Surface | Powder-coated textured PEI |
|---|---|
| Base | 0.5 mm stainless steel with enhanced magnetic adhesion |
| Stated strength | Resists warping on large models in ABS, PC and nylon |
Stock photograph of this product class, not of this specific unit.
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2. The second plate that keeps you printing
BIQU PyroGrip Textured PEI Plate
Textured PEI at roughly half the official price, so having two is reasonable.
The value of a second plate is availability, not performance. A contaminated plate that needs washing and drying stops the queue; with a spare it costs you a swap.
Same surface technology and mounting as the official plate, cited at roughly half the price.
What it gets right
- Same surface technology and mounting as the official plate at a much lower price point
- Makes keeping two or three plates on the shelf a reasonable decision rather than an expensive one
- No adapter, no modification — it drops onto the magnetic bed you already have
What it does not
- PEI thickness and coating consistency vary more between third-party plates than within one brand's official line
- Expect to re-tune Z offset when you swap brands mid-queue
- Not a performance upgrade over the official plate — a price one
| Surface | Textured PEI |
|---|---|
| Mounting | Same mounting system as the official plate |
| Price positioning (cited) | Roughly half the official plate |
Questions people actually ask
Why is my print not sticking to the build plate?
Skin oils on the plate, most of the time. Wash it with dish soap and hot water, dry it, and handle it by the edges afterwards. Then check Z offset - the first layer should look like flattened ribbons fused together, not round beads sitting on the surface - then bed temperature, then add a brim.
Should I clean my build plate with isopropyl alcohol?
Not as the primary method. Alcohol dissolves skin oils and then redeposits them as a thinner film across a wider area as it evaporates, which can leave the plate worse. Dish soap and hot water removes oil properly. Alcohol is useful for a specific spot of residue.
Why does my textured PEI plate not stick any more?
Contamination first, wear second. Wash it properly with soap and hot water before concluding anything. If a correct wash does not restore adhesion, the PEI surface is worn out - plates are consumables, and skin oils and metal scrapers shorten their life more than printing does.
Should I use glue stick on a PEI plate?
No. PEI is designed to grip without adhesives, and glue or hairspray leaves residue that reduces bare adhesion once you stop - so you end up needing it permanently. If you feel you need glue, something earlier in the diagnostic list is wrong.
Why does my PETG stick too well and damage the plate?
PETG bonds strongly to smooth PEI, sometimes strongly enough to take surface with it when you remove the part. Print PETG on a textured plate, which releases more readily, and let the plate cool fully before removing the part.
Sources
Read this next
- The textured PEI plateWhy textured PEI is the right default plate, how to clean it so it keeps working, and the one material it is wrong for.
- The best build plates for a Bambu LabTextured, dual-texture or third-party - which plate to buy, and why owning two beats owning one good one.
- Textured PEI vs smooth PEITextured for grip and forgiveness, smooth for a glossy bottom face. Which to use per print, and the dual-texture middle ground.
- Why your prints keep warpingHow to distinguish corner lift from layer splitting, and the four causes behind warping with the cheapest fixes first.
- Print quality triageThe central symptom-to-cause table for the whole site, with the two free checks that resolve most problems before any purchase.