Our dryer was drying only after putting it through twice or more, and we eventually just took everything to the laundromat. We'd had someone in to look at the dryer itself and discovered it must have something to do with the venting.
When Pat came he did a thorough diagnostic and discovered the specific issues related to the venting. He explained the issue thoroughly and offered a very accurate quote.
As soon as he did the repairs the dryer worked 2-3x faster. Such a relief, and we have had numerous people try to solve this problem over the years.