If you’re tired of your 3D prints peeling off the bed halfway through, the first thing you should check is how clean your build plate actually is. Even if it looks spotless, tiny oils from your fingertips get transferred every time you touch it, and those oils act like a non-stick coating for your plastic. For cleaning nothing beats a good old-fashioned scrub with warm water and basic dish soap. The soap breaks down those stubborn oils and washes away any leftover dust or residue. Just make sure you rinse it well and try not to touch the surface while you’re putting it back on the printer.
Here’s Bambu’s word on bed cleaning:
https://wiki.bambulab.com/en/filament-acc/acc/pei-plate-clean-guide
And here’s Prusa’s:
https://help.prusa3d.com/article/textured-steel-sheet_196534
Another huge reason prints fail to stick is “wet” filament, which happens because most 3D printing plastics act like a sponge for moisture in the air. When that damp plastic hits the hot nozzle, the water inside turns into steam, creating tiny bubbles and inconsistent pressure. This makes the first layer come out uneven or textured, so it can’t grab onto the bed properly. If you hear little popping sounds while printing or see a lot of “stringing,” your filament probably needs some time in a dryer or a food dehydrator. Keeping your rolls dry makes the plastic flow smoothly, which is the secret to getting that perfect, solid foundation every time.
If you’re using an older (or budget) printer you might need to make sure your Z offset is perfect. If not, that will definitely cause the first layer to not stick.
Last but not least, make sure you have your temperatures are set correctly. If not, this can also cause first layer failures.