I did it I broke my dremel so for several days I have been using this portable battery powered one for the amount of work I am doing with it it's like driving a square peg through a round hole and force is not good
you can always open up your dremel and clean out the junk, probably won't save your dremel but hey if it does
I was doin about 3 good days of constent dremelling you know off on off on and I cracked it open the other day and found out one of the brushes got jammed in with the rotating portion :-/ hopfulling I can get a few new brushes and it will be as good as new