I have a Grizzly Dust collector which has, up to now, been just fine. Lately I've noticed a drop in efficiency so I cleaned out the lower bag, checked for leaks in the system and any blockages in the PVC 4" pipes - all seems ok. I have an add-on upper bag which is supposed to filter better that the supplied one. I have never tried to clean it mainly because the lower bag gets all the sawdust, etc.
Should I try to clean the upper bag and how? Doesn't seem like there's anything to 'empty' but appears that there's a fine coating of dust along the walls. Would this result in reduced suction? I guess I could try a shop vac.
Thanx,
Vic