How to Prevent PETG Warping from the Print Bed

Question: How do I stop PETG from warping off the bed?

Answer: To prevent PETG warping, start by ensuring your print bed is clean and free of grease—use isopropyl alcohol for best results. Set your bed temperature between 70-80°C to help the filament stick better. Use a suitable build surface like PEI sheets, glass with a glue stick, or blue painter's tape for added adhesion. Apply a thin layer of glue stick or hairspray if needed. Level your bed carefully so the nozzle is at the correct height—too far reduces adhesion; too close can cause extrusion issues. Enable a brim or raft in your slicer settings to increase the contact area with the bed, which helps hold corners down. Avoid drafts and sudden temperature changes by printing in an enclosed or draft-free environment. Finally, slow down your first layer speed to around 20-30 mm/s to improve adhesion. Following these steps will significantly reduce PETG warping during your prints.