What kind of filament are you using? Acetone will not do much for petg and torching it can bake it into a hard mess. Have you tried doing a cold pull?

Found that pla and petg can cause clogs if they get too hot. Is your hotend a fixed block or one of the ones where you need to secure the block while tightening the nozzle? How tight is your extruder? Like the screw that holds it closed, you can strip the heck out of filament which ends up looking like a clog. Have had some filament mushroom in the heatbreak before and that can cause issues.