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 oils or dust. Use isopropyl alcohol to wipe the surface. Set your bed temperature between 70°C and 80°C to help the first layer stick better. Apply a suitable adhesion aid such as a PVA-based glue stick, blue painter’s tape, or a PEI sheet for extra grip. Level your bed carefully and adjust the nozzle height so the first layer is slightly squished but not too close. Print the first layer slower (around 20-25 mm/s) to improve adhesion. Avoid drafts and sudden temperature changes by enclosing your printer or printing in a stable environment. Finally, consider adding a brim or raft in your slicer settings to increase the surface area of the first layer, which helps keep the print anchored. These steps combined should significantly reduce warping with PETG.