To fix brittle bed adhesion in 3D models, adjust build plate temperature, clean the plate, use adhesion aids, and optimize first-layer settings.
Set the build plate to your filament’s recommended range (e.g., 50-60°C for PLA)—rapid first-layer cooling causes brittleness, so a warmer bed improves bonding.
Clean the plate with isopropyl alcohol to remove oils/residue. Add grip with glue stick, hairspray, or a PEI sheet.
Check first-layer height (slightly thicker helps contact) and nozzle distance—too far means poor adhesion.
Try these steps one by one to solve brittle adhesion for your setup.