First Layer Not Sticking? A Step-by-Step Fix List for 3D Printers

Start with the cheapest explanation

When a print peels off the bed, drags around behind the nozzle or never forms a solid first layer, the temptation is to start changing everything at once. Resist it. Prusa's own first-layer troubleshooting article, Creality's K2 support guidance and owner troubleshooting threads on the Bambu Lab forum all point at the same short list: a contaminated build surface, a nozzle that sits too high or too low, a bed temperature that does not suit the filament, and a first layer printed too fast. Change one thing at a time and you will know which one fixed it.

This list is ordered from the cheapest and most common fix to the least likely. It applies to bed-slingers such as the Bambu Lab A1 and to enclosed CoreXY machines alike, although the menus differ. If your printer is one we have covered, the relevant review is linked further down.

Step 1: Wash the plate properly, and stop touching it

Skin oil is the villain manufacturers name most often. Creality's K2 troubleshooting page lists hand sweat on the platform as a cause of poor adhesion and recommends dish soap and water. A Bambu Lab support post on its textured PEI cleaning guide makes the same point: oils from your hands transfer to the surface and show up in the first layer even when you cannot see them.

How you clean matters. Prusa recommends 90% isopropyl alcohol for routine wipes and warns against weaker dilutions, but when adhesion fades it says to wash the sheet with a few drops of dish soap in warm, not hot, water and dry it thoroughly. On the Bambu forum, several owners with a textured plate that stopped holding prints reported that alcohol mostly moved grease around, while a scrub with hot water, detergent and a brush brought adhesion back. The logic is simple enough: on textured PEI the oil sits down in the texture, and a degreaser plus scrubbing reaches it where a quick wipe does not.

After washing, handle the plate by its edges. It sounds fussy, but a single thumbprint in the middle of the plate is enough to lift a corner on a long print.

Step 2: Confirm the slicer knows which plate is installed

On printers that support several plate types, the slicer chooses bed temperature and, on some machines, nozzle offset based on the plate you select. If you slice a job for a smooth cool plate and then print on textured PEI, you are asking for trouble. Before you start adjusting hardware, check that the plate type in Bambu Studio, PrusaSlicer, Creality Print or OrcaSlicer matches the plate physically sitting on the bed.

Also check that the plate is seated flat. Prusa's article specifically calls out debris or a stray strand of filament trapped under a flexible sheet, as well as a bent or damaged sheet, as causes of an uneven first layer. Lift the sheet, wipe the magnetic bed underneath and drop it back on.

Step 3: Get the nozzle height right

Nozzle height, called Z offset, Live Adjust Z or squish depending on the printer, is the most common setting-related cause of a bad first layer. Teaching Tech's calibration guide describes the two failure modes clearly: too far away and the filament is not pressed down enough to stick; too close and the line spreads out into elephant's foot or, in extreme cases, the extruder cannot push filament out at all.

Ellis' Print Tuning Guide gives a practical way to judge it. Too little squish leaves visible gaps between lines. Too much squish makes the lines disappear into a glassy surface, with ridges or wavy patterns on top. On textured plates the bottom lines are harder to see, so judge the top surface instead. Teaching Tech's site offers a first-layer test with squares in the centre and corners of the bed, which also exposes a bed that is high on one side.

There is one important caveat from Prusa: do not keep lowering Live Adjust Z to force adhesion on a dirty or wrong plate. Prusa warns that an over-low setting can damage the sheet and that this damage is not covered by its warranty. If you have already cleaned the plate and the lines still look round and separate, lower the nozzle in small steps. If the lines are already flat and translucent and prints still lift, go back to Step 1.

Most current printers from Bambu Lab, Creality and Prusa probe the bed automatically, so a lot of owners never touch this setting. Creality recommends re-running its print calibration after changing filament type, moving the printer or updating firmware, and fine-tuning Z offset from the first-layer result only after that. Its K2 page also notes that leftover filament on the nozzle can throw off homing and leave the first layer too high, so clean the tip before a calibration run.

Step 4: Check temperature, speed and drafts

Bed temperature that is too low for the material lets the part shrink and pull away, according to Creality's K2 guidance. Creality's general adhesion article suggests roughly 50 to 70°C for PLA and 70 to 90°C for PETG, and Prusa suggests raising the bed by 5 to 10°C for materials that are reluctant to stick. Start from the filament maker's recommendation, and do not treat higher as always better.

Speed matters too. Prusa's article recommends dropping to about 75% speed for the first three layers when you are fighting adhesion, then returning to normal. Creality's article also names a too-fast first layer as a cause.

Finally, look at the room. Creality points to drafts cooling corners too quickly and uneven room temperatures. An open printer near a window, a furnace vent or a ceiling fan will lift corners on wide, flat parts no matter how clean the plate is.

Step 5: Add adhesion helpers only once the basics are right

A brim is the first helper to reach for because it costs nothing. Prusa says to enable a brim in PrusaSlicer before trying other aids, since it simply adds contact area; Bambu forum members fighting lifting corners also reported using larger brims or small mouse-ear discs at the corners.

Glue stick comes next. Prusa recommends plain PVA glue for PETG, ABS, ASA, nylon and flexibles, says it is not usually needed for PLA, and warns never to use superglue. Glue also works as a release layer: Prusa notes that PETG, ABS and ASA can bond so strongly to smooth PEI that they damage it. Creality ships a glue stick with the K2 and recommends a thin coat, and it says to wash off built-up glue with water once the plate has been through several prints.

Moisture can masquerade as an adhesion problem as well. Creality's adhesion article mentions damp filament bubbling or warping. Cameron saw how much wet filament matters on his own Bambu Lab P2S: an undried PETG spool produced a badly strung 16-hour print. That was stringing rather than a first-layer failure, but if your filament crackles as it extrudes, dry it before you blame the bed.

Step 6: When it still fails, look for hardware

If the plate is clean, the plate type is right, the height is tuned and helpers are in place, the remaining causes are mechanical. Prusa lists partial clogs, an uneven bed and loose nozzle or bed hardware; Creality lists a loose nozzle or hot bed and a faulty strain gauge among its K2 causes. Neither manufacturer asks you to diagnose a sensor fault yourself, so contact support at that point rather than taking the printer apart.

A worn plate is also a real possibility after many months of use. Prusa describes restoring smooth PEI with the abrasive side of a kitchen sponge or fine sandpaper, and notes that acetone can refresh smooth PEI but should not be used on textured or satin sheets. A replacement plate is often cheaper than hours of chasing settings.

For model-specific notes, our research reviews of the Bambu Lab A1 (Bambu Lab A1 review), Bambu Lab P1S (Bambu Lab P1S review), Prusa CORE One+ (Prusa CORE One+ (Gen 2) review) and Creality K2 Plus (Creality K2 Plus review) are based on manufacturer documentation and published coverage rather than hands-on testing. Cameron's hands-on Bambu Lab P2S review is at Bambu Lab P2S Combo (AMS 2 Pro) review.

From a tech standpoint

First-layer problems feel mysterious, but the fix is usually boring: wash the plate with soap and water, check the plate type in the slicer, then tune nozzle height in small steps. Only after that should you add a brim or glue, and only after all of it should you suspect hardware. Doing it in that order saves filament, plates and a lot of frustration.