3D print corners lift off the bed: warping and bed adhesion

Clean the bed, get the first layer right and add a brim. Those three fixes cure most warping.

What the message means

Plastic shrinks as it cools. Large flat parts pull at the corners, and if the first layer does not grip, the corners lift.

Fix it in this order

1. Wash the bed with dish soap and water, or wipe it with isopropyl alcohol.
2. Level the bed and set the nozzle height so the first layer is slightly squashed.
3. Raise the bed temperature a little within the range for your plastic.
4. Add a brim of a few millimetres around the part in the slicer.
5. Keep drafts and open windows away from the printer, or use an enclosure.
6. Slow the first layer and turn the cooling fan off for it.
7. Round the sharp corners of large parts in the design.

If you see this, do this

Related

wheel slips on the shaft, stringing.

Last reviewed: November 2026. These are the usual causes and the order that finds them fastest. Test on your own board; clones and cables differ.