When a clothes dryer stops drying as well as it should, there's a number of possible reasons why. Don't assume your dryer is dying or you need to replace it. Sometimes, dryer issues aren't even indicative of a malfunction. Maybe you're not using your dryer correctly or paying it enough attention.
Are You Using Your Clothes Dryer the Right Way?
If you're not using your dryer according to the manufacturer's instructions, you'll likely run into drying issues.