Dryer slow drying, terrible moldy smell
I've got an 8 year old whirlpool electric dryer that's been cantankerous for a while. It's taking a few dryer cycles to dry clothes, and it smells awful. Very bad. Like mold. I disassembled the whole thing last night and didn't find anything off - no lint blockages, the heating elements very hot (seemed like a good idea at the time to touch it), the fan is drawing vaccuum and exhausting properly through the vent. My first inclination is that the venting duct through the wall is blocked, so I've disconnected the dryer from the wall vent and am just venting directly through an outside door to see if that does anything. I've run a snake through both ends of the wall vent as far as it'll let me go, and I'm not finding anything. However when the dryer is connected to the wall vent and I turn it on, go outside and put my hand at the exhaust vent, I'm not feeling a draft.
Has anyone else experienced something similar? Is it likely to be the ductwork clogged, or am I barking up the wrong tree?