First Layer3D printing for beginners, one fix at a time

Why won't my first layer stick? The beginner's fix order

By , First Layer · · 9 min read · Troubleshooting

Short answer (checked October 28, 2026): in most cases your plate is greasy, so wash it with hot water and plain dish soap and stop touching the printing surface. Bambu Lab's own wiki says this "solves most issues related to adhesion." If a clean plate doesn't fix it, the next suspects, in order, are the wrong plate type picked in your slicer, a nozzle sitting too high above the bed (the Z offset), a bed that's too cool for your filament, and a part that's simply too small or pointy to hold on without a brim.

The order matters. Most beginners jump straight to changing temperatures or buying glue, when the fix was a sink and a drop of dish soap. Work down the list below and stop as soon as the problem goes away.

The 60-second diagnosis: what does your first layer look like?

Before changing anything, look closely at the failed first layer (or at the strands stuck to your nozzle). The shape of the lines tells you which fix to try.

What you see Most likely cause Go to
Lines look fine but lift or slide around, worse in some areas Dirty or oily plate Fix 1
Round, separate lines with gaps, peel off like spaghetti Nozzle too high Fix 3
Lines see-through, wavy or ridged, nozzle scrapes, little plastic comes out Nozzle too low Fix 3
Started fine on a textured plate, fails since you changed plates Wrong plate type in slicer Fix 2
Big flat part sticks in the middle but corners curl up Warping, needs more grip or cooling Fix 5
Tiny or tall thin parts get knocked loose Too little contact area Fix 5
One corner of the bed always fails Leveling or a warped bed Fix 6

These descriptions follow the "too high / too low" symptoms in Bambu Lab's first-layer optimization guide: a first layer that is too high has "sparse" lines "with visible gaps between them," and the guide's goal is lines that are "well bonded with no visible gaps."

Fix 1: Wash the plate properly (this solves most cases)

Skin oil is invisible and it ruins adhesion. Prusa calls a greasy print sheet the "#1 cause of prints detaching" in its MK4 setup guide.

How to wash a PEI plate (the common flexible magnetic sheet):

  1. Let the plate cool, then take it off the printer.
  2. Wash it at the sink with a few drops of plain dish soap. Bambu Lab says hot water and detergent; Prusa says warm water, not hot, and not to submerge the sheet. Warm water is the safe middle ground for both.
  3. Rinse well and dry with an unscented paper towel.
  4. From now on, hold the plate by its edges only.

Between washes, Prusa recommends wiping the cold sheet with 90% or stronger isopropyl alcohol (IPA) on a paper towel. Two traps catch beginners here:

Never use acetone on a textured or satin sheet. Prusa says acetone is only for occasional use on smooth PEI and that it deteriorates textured sheets. Watch out for nail polish remover, which often contains it.

Fix 2: Tell your slicer which plate you're actually using

This one is specific, and many top results skip it. Your slicer (Bambu Studio, OrcaSlicer and others) asks which build plate is installed, and it uses that answer to set the bed temperature and, on Bambu printers, the nozzle height.

According to Bambu Lab, when you select the Textured PEI Plate the printer lowers the nozzle by 0.04 mm after leveling, so the plastic can press into the texture. If the textured plate is on the printer but a different plate is selected in the slicer, "the nozzle height will be too high." The bed may also be heated to the wrong temperature for that surface.

Check: in Bambu Studio, look for the plate type setting in the printer section of the Prepare tab. Match it to the plate physically on the bed every time you swap plates.

Fix 3: Get the nozzle height right (Z offset)

The first layer should be gently squished onto the bed. Too high and the plastic just lays on top; too low and the nozzle can't push plastic out.

On self-calibrating printers (Bambu Lab A1, A1 mini, P1 and X1 series):

  1. Wipe the nozzle tip clean of old plastic. Bambu Lab notes that a dirty or leaking nozzle can throw off the leveling measurement and leave the first layer too high.
  2. Run bed leveling from the printer's calibration menu.
  3. Keep "Bed Leveling" ticked in the print dialog. Bambu Lab strongly recommends leaving it on for every print.

On Creality Ender-3 V3 SE and similar printers with a probe: auto leveling measures the bed, but the starting Z offset can still be off. Creality's own troubleshooting page for this exact symptom says to adjust the Z offset slightly while the first layer prints, and to update the firmware to version 1.0.4 or later.

Here's how to do the "live" adjustment:

  1. Start a print that has a large, one-layer area (a bed-level test pattern from a model site works well).
  2. While the first layer prints, open the printer's Z offset setting and change it in small steps. Users on the Creality forum describe lowering the nozzle until you get "a good squished bead stuck to the bed," noting that the auto routine often needs an extra 0.05 to 0.1 mm.
  3. Make one small change, then watch a few lines before making another.
  4. Save the setting when it looks right. Forum users point out that a value you don't save is lost.

How to read it: more negative Z offset moves the nozzle closer. If lines have gaps, go closer. If the surface turns rough or ridged, or the nozzle starts dragging, back off.

Fix 4: Check the bed temperature against the filament

A bed that's too cool is a common cause after a profile edit or a filament swap. For plain PLA:

Source Bed temperature for PLA
Bambu Lab PLA guide 55°C default
Prusa PLA guide 60°C recommended
Prusament PLA data sheet 40 to 60°C

Use the filament maker's number from the spool label first, then the slicer's preset for that filament. Bambu Lab says raising the bed temperature slightly increases adhesion on its textured plate, but warns that too much heat with PLA and PETG can cause nozzle clogs and "elephant foot" (a bulging bottom layer).

The hot-room trap: Bambu Lab's PLA guide says PLA softens at about 57°C, and in hot conditions it suggests lowering the PLA bed temperature by 5 to 10°C and opening the printer's door to prevent clogs. If your prints stopped sticking at the same time the extruder started clicking, heat is a suspect.

Fix 5: Give small or warping parts more to hold on to

Grip is roughly proportional to contact area, as Bambu Lab puts it. Small feet, thin towers and sharp corners have little to hold on with.

Fix 6: If one area always fails

If the same corner fails every time, cleaning won't fix it. Creality says to check for plastic stuck under the nozzle and on the bed, "especially the lower left corner," and to inspect whether the X axis is level and the bed or its carriage is bent from shipping. Its troubleshooting page links a service video for adjusting it, and support is at cs@creality.com.

On a Bambu textured plate, if one side still won't grip after all the above, the wiki suggests flipping to the other side and contacting support if it's under warranty.

Fix 7: Glue stick, as a last resort for PLA

Glue isn't the first fix for PLA. Prusa says that in its experience glue is not needed for PLA and is mainly for PETG, nylon, ABS, ASA, flexible filaments and other materials. Bambu Lab recommends its glue for cases such as non-PLA materials on the Smooth PEI plate.

If you do use it, Prusa says a plain PVA glue stick works, applied thinly, and washes off with dish soap and water. Never use superglue on the plate.

One more thing: glue also works as a separator. With PETG on smooth PEI, Prusa warns adhesion can be so strong it damages the sheet, which is why glue is recommended there.

Example scenario: a print that fails after weeks of working

This is an illustration with stated assumptions, not a real reader's printer. Say a beginner's A1 mini printed PLA fine for a month, and now small parts come loose halfway through. Nothing in the settings changed. The table points to Fix 1, because a month of handling adds fingerprints. A dish-soap wash fixes it. If it didn't, the next check would be whether a textured plate was swapped in without changing the slicer setting (Fix 2), and only then the nozzle height.

Printable checklist

  1. Wash the plate with dish soap and water; dry it; handle by the edges.
  2. Plate type in the slicer matches the plate on the bed.
  3. Nozzle tip clean; run bed leveling; leave leveling on.
  4. Z offset tuned live on a test pattern and saved (Creality and other probe printers).
  5. Bed temperature matches the spool label and slicer preset.
  6. Brim or mouse ears on small, tall or warping parts; fan on for PLA.
  7. Same spot always fails? Check for debris, a bent bed or the X axis.
  8. Still failing on PLA? Try a thin layer of glue stick.

If you haven't bought a printer yet, the self-calibrating models in our beginner printer guide take most of steps 3 and 4 off your hands. For more fixes, browse the troubleshooting topic.

Sources

Checked October 28, 2026.

Quick answers

Why is my first layer not sticking to the bed?

The most common cause is an oily or dusty build plate, usually from fingerprints. Bambu Lab says washing the plate with hot water and dish detergent solves most adhesion problems. After that, check the plate type selected in your slicer and the nozzle height (Z offset).

Do I need glue stick for PLA?

Usually not. Prusa says glue is not needed for PLA on its sheets, and Bambu Lab recommends its glue mainly for non-PLA materials on the Smooth PEI plate. A clean plate and the right nozzle height fix most PLA problems.

How do I know if my nozzle is too high or too low?

Too high: round, separate lines with gaps between them that peel off easily. Too low: flat, see-through or ridged lines, rough patches, or no plastic coming out at all. The goal is lines that are slightly flattened and touch each other with no gaps.

Should I clean my 3D printer bed before every print?

Not necessarily. Prusa says that if you never touch the print surface with your hands or dirty tools, you don't have to clean it before every print. Wash it whenever you've touched it or adhesion gets worse.

Sam Okafor is the pen name of First Layer's editorial team. Specs and prices come from the manufacturer pages and sources linked above, checked on the date shown. Prices change often, so confirm before you buy. Example scenarios are illustrations with stated assumptions, not real buyers. Some links may be affiliate links that pay us a commission at no extra cost to you.