Today when working in the shop I turned on my dust collector and as usual it sucked, after a few minutes I heard a poof, dust collector is not in the shop it is downstairs, and all of a sudden the collector was sucking twice as good as it was. Oh No, said I, shut it off and went downstairs and had to wait a few minutes for the dust cloud to settle. One of the upper bags poped off the unit and sprayed dust everywhere. The two lower bags where completely full and the upper bags where clogged up. So after a 40 minutes of emptying and shaking out then blasting the bags with compressed air I was back to work. I think I will check them more often in the future