When your clothes are not drying good enough chances are that you just need to clean the lint and whatever out of your dryer. In this video, this was my own dryer that just wasn’t working good any longer.
With a gas or electric dryer make sure you unplug the electric. Now just remove the back cover and with a vacuum clean whatever dirt, lint or even a bird’s nest. Now remove the 4-inch air duct “discharge” hose and look inside. You’ll be surprised what you’re going to see. Reach in and clean. Making sure you remove anything and everything and you should be fine. Now, of course, you can have other issues but this is a good start to finish on cleaning it up.