Our electric dryer isn't drying as quick as it had in the past, but
eventually it does dry. Once in the past a repairman came out and cleaned
out the exhaust line and it began drying much better. Therefore I went
outside while it was running and from the amount of air, it appears that the
air is unimpeded. What could be the problem? Should I try to look inside
the dryer for more clues? Are dryers simple to get into?

Thanks.