Hello, I can't seem to figure out what's going on here.. but ever since 4-5 days ago, the titan ALWAYS stops extruding after about 1 hour into the print... I noticed, no matter what filament (4-5 diff ones) I use, there seems to be some stripping, but I never hear a click. I already calibrated the extrusion rate, and my retraction distance is 0.6. I have not changed anything from when it was printing just fine. I've never put thermal grease on the heatbreak/heat sink, and have printed fine many times before. I'm thinking there is some heat creep going on, but I'm not sure how to fix it.. I've already got the stock fan on it blowing 100% full blast. Has anyone had this problem before?? It just randomly stops extruding at some point into the print.