How to prevent PETG warping on the print bed

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

Answer: To prevent PETG from warping, start by ensuring your print bed is clean and free of grease—use isopropyl alcohol for best results. Set your heated bed temperature between 70°C and 80°C to improve adhesion. Use a suitable bed surface like PEI sheets, glass with a glue stick, or blue painter's tape to help the first layer stick well. Adjust your first layer height and speed: a slightly thicker first layer (0.2–0.3 mm) printed slower (20–30 mm/s) can improve adhesion. Enable a brim or raft in your slicer settings to anchor the print edges. Also, avoid cooling fans during the first few layers or keep them at a low speed, as rapid cooling can cause warping. Lastly, printing in an enclosed or draft-free environment helps maintain consistent temperatures and reduces warping risks. Following these steps should greatly reduce PETG warping on your print bed.