How often do you grease the clutch and bar sprocket? How often do you clean or change out the airfilter? I do both daily after a day of cutting. Since I clean my air filters every evening I don’t carry extra air filters. I split my airfilters and spray ether from the inside out on the mesh nylon filters. My son is up in the wilds cutting I gave him new filters for both husky saws. Ether removes the oil from the airfilters.