Filament Grease Box v2 - Filament Cleaner

My Makerbot Rep 2 was driving me absolutely insane - constantly stopping extrusion at approx. 10-15% print. I tried everything from cleaning the extruder and drive wheel, to slowing the print and messing with temperatures, to replacing the thermocouple, and nothing quite bit with it. That's when I tried to oil and clean my filament before feeding. Now, I've been getting consistent prints for about 2 weeks. At first, I had just put a piece of tape with cotton soaked in WD40 to test proof-of-conce