Last week, out of nowhere, our dryer started vibrating VERY loudly. Called the repairman and he told me there's nothing wrong with the dryer and that the air vent on top of the house (most people have it on the side of theirs) probably needs to be cleaned out. The people who do that haven't called me back yet...

Does anyone have experience with this? It doesn't seem right to me but I'm obviously no expert. Im so annoyed drying anything because it's on our bedroom level and way too loud whether we are awake or asleep. Andddd at 36 weeks pregnant I would really like to be washing and drying baby stuff.