When 3D printed layers peel at home, it’s almost always due to poor layer adhesion from three key issues—incorrect bed temperature, a weak first layer bond, or moisture in the filament.
- **Wrong bed temperature**: If the bed is too cool, the previous layer cools too fast to bond with the new one, breaking the connection between layers. - **Weak first layer**: If the first layer isn’t slightly squished onto the bed (a "flat, sticky" base), subsequent layers lack a stable surface to stick to. - **Wet filament**: Moisture trapped in filament creates tiny bubbles during printing, which weaken layer-to-layer adhesion.
To fix peeling, calibrate your bed to the filament’s recommended temperature, adjust the first layer to be flat and well-adhered, and dry damp filament in a dehydrator (or low-heat oven) until it’s no longer brittle or damp.