If I preheat the extruders and platform to 230 and 100 degrees and measure the temperatures using an IR thermometer, the extruder temperature is about 170 degrees and the platform temperature is about 100 degrees. I tried to point the IR thermometer at the nozzles and the heating blocks but I can't get the correct temperatures. For no reason, the PETG stopped sticking to BuildTak, blue painter tape, and kapton tape. I got PrintByte but I couldn't install it because I don't have a saw for cutting plastic sheets. Any suggestions?