Over the last few months the dryer has been really smelly. The girls in the shop didn't notice so much but when i would come in after they had been printing for a few hours it seemed really smokey and hard to breath. It smelled like exhaust. We keep the filters on the dryer cleaned out so that wasn't the problem.
I thought maybe there was a leak in the pipe. So I'd get up there with a ladder and add more duct tape. Didn't seem to help though.
Then in the middle of the night my wife wakes me up and says she had a dream the dryer started on fire and we need to check for clogs on top of the roof.
So the next day i climb up there and holy crap, she was right.
There wasn't much lint in the pipe itself, but the cap had this little mesh thing to keep the birds out i guess. Anyways that thing was soild with lint.
So i ripped it off. That did the trick. We couldn't believe what a difference it made!
I feel so bad for making the girls work all those months breathing in exhaust. So check your exhaust everyone!
For good measure i got some high heat tape on my pipes as well.
You can see photos of what i'm talking about here:
http://imgur.com/a/IsPAG