3D print not sticking to the bed: a first-layer troubleshooting checklist

Why the first layer matters

Prusa calls a poor first layer by far the most common 3D printing problem and notes that many other print failures stem from it [1]. If the first layer does not bond, nothing above it can succeed, so it is worth fixing methodically rather than changing several settings at once.

The steps below run from cheapest and most likely to most expensive. Change one thing, run a small test print, and move on only if the problem remains.

Step 1: clean the plate properly

Invisible residue is the first suspect. Bambu Lab says dust from the air and sweat or oil from handling build up on the plate and reduce adhesion [2]. Prusa recommends 90% isopropyl alcohol for routine cleaning and warns that cosmetic products such as skin or nail cleaners can contain oils that make things worse [1].

When alcohol stops working, both makers point to soap. Prusa suggests a few drops of dish soap and warm, not hot, water to dissolve oils that alcohol leaves behind, followed by thorough drying [1]. Bambu Lab’s A1 mini FAQ likewise advises cleaning the textured PEI plate with warm water and regular soap to maintain adhesion [4].

Handle the plate by its edges afterwards. Prusa notes you do not need to clean before every print if you avoid touching the surface with hands or dirty tools [1].

• Do not use acetone on textured or satin PEI sheets; Prusa allows it only on smooth PEI, around once a month, and not before PETG [1].
• Check that the plate is properly installed, with no leftovers or loose filament underneath it, and that it is straight rather than bent or damaged [1].

Step 2: check nozzle height, not just squish

Prusa explains that if the nozzle is too close to the surface, plastic cannot leave it, and you will see little or no extrusion for the first layer or two [1]. Many current printers calibrate nozzle height automatically, but a manual Z offset change or a nozzle swap can throw it off.

Resist the urge to fix adhesion by lowering the nozzle. Prusa explicitly warns against compensating for poor adhesion with a lower Live Adjust Z, because going too low can damage the sheet and cause vibration, and it says damage from an incorrect value is not covered by its warranty [1].

After replacing a nozzle, rerun the printer’s first-layer or bed-levelling calibration before blaming the plate.

Step 3: match bed temperature and plate to the filament

Bambu Lab says bed temperature strongly influences adhesion and that a higher bed temperature increases it, while warning that too much heat with PLA or PETG can cause nozzle clogs and elephant foot [2]. Prusa suggests trying 5–10 °C more on the bed for materials that do not stick [1].

Plate type matters as well. The table shows Bambu Lab’s published ranges for its own plates; other brands publish similar charts, so check your printer’s documentation if you use a different system.

• Ranges are from Bambu Lab’s material table [3].
• On enclosed printers, Bambu Lab recommends opening the door or lifting the top cover when printing PLA above a 45 °C bed, to avoid softening filament in the extruder [3].

Step 4: add contact area, then glue

Bambu Lab notes that adhesion is roughly proportional to contact area and recommends adding a skirt to small objects to increase it, and supports for tall, slender parts that the nozzle can knock over at high speed [2]. Prusa similarly suggests trying a brim before adding adhesion products [1].

Glue is the next lever. Prusa says a basic PVA glue stick is not needed for PLA in its experience but may be advisable for PETG, ABS, ASA, nylon, polycarbonate and flexible materials, and it warns never to put superglue on a sheet [1]. Glue also works the other way: on smooth PEI, Prusa uses it as a separating layer because PETG can bond so strongly that it damages the sheet [1]. Bambu Lab’s A1 mini FAQ says its smooth PEI plate needs glue for PETG and TPU [4].

Bambu Lab also suggests a first-layer line width of 0.5 mm and layer height of 0.25 mm in its slicer when adhesion problems persist [2]. Prusa suggests slowing the first few layers to about 75% speed [1].

Step 5: decide whether the plate is worn out

Plates are consumables. Prusa says PEI can lose its adhesion after a couple of hundred hours [1], and Creality’s K1C maintenance guide calls the printing platform a consumable that should be replaced regularly [5]. Bambu Lab’s troubleshooting guide says to try the other side of a double-sided plate if one side no longer holds, and to contact support if the plate is still under warranty [2].

Look for shiny or worn patches inside the printing area. Bambu Lab notes that coating wear inside the print area can affect quality and recommends using the other side or a new plate [2].

Quick checklist

Print this list and work down it before buying anything.

• Wash the plate with dish soap and warm water, dry it, and stop touching the print surface [1][2].
• Confirm the plate is seated flat with nothing underneath it [1].
• Rerun automatic calibration; do not lower Z offset to force adhesion [1].
• Check bed temperature and plate type against the maker’s chart for your filament [3].
• Add a brim, then glue stick where recommended [1][2].
• Slow the first layers [1].
• Flip or replace the plate if a clean, correctly set plate still will not hold [2][5].

Sources & verification

Product details and prices can change. Check the linked provider before buying.

1. Prusa Knowledge Base: First layer issues Accessed 30 Oct 2026
2. Bambu Lab Wiki: Textured PEI plate troubleshooting guide Accessed 30 Oct 2026
3. Bambu Lab Wiki: filament guide and material table Accessed 30 Oct 2026
4. Bambu Lab Wiki: A1 mini FAQ Accessed 30 Oct 2026
5. Creality Wiki: K1C / K1C 2025 maintenance tips Accessed 30 Oct 2026