Please Help I am having a problem that only happens when I have a long straight run of plastic.The plastic is extruded but is not adhering to the other layers. It happens on long runs. Not so much the top or bottom layers though. This run is about 5 inches or so. In this 2nd photo, looking closely, you can see the rectangular infill behind the droopy long tread. I have the stock fan. In this case I am using Raptor PLA which is supposed to print just like PLA but at 240 degrees. Here are the Simplify3d details. I am printing with Extruder 1. Raptor PLA @ 240.