noise, shaking, from foreign object in the blower, from operating without the lint filter

Lint filter replacement is routine maintenance. operating without a filter causes problems, a dryer sheet was sucked thru the opening and into the blower wheel, causing a lot of noise, and shaking because of the unbalance. I popped the top of the machine up, removed two screw holding the front in place, removed the front, gaining access to blower.
Removed the offending sheet, straighted the bent fin, and put everything back together again. Installeed the new filter, now it runs smooth, and quiet. mission accomplished.