Clothes dryer fixes

The article at the link below has a lot of good information on making your clothes-drying appliance more efficient and performing some simple repairs if needed.  The article includes information such as the reduction (15% for each 90-degree bend) in efficiency from bends in the exhaust vent tubing that leads to the outside of your house.  Also, lint can clog the lint filter, reducing dryer efficiency, but a lot of lint can also build up in the lint filter housing and reduce the dryer’s efficiency.  The link in the article leads to a YouTube video on how to clean the housing.  The video also explains why anti-static dryer sheets are bad for your dryer (they coat the filter and the inside of the dryer with a waxy substance). 
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https://earth911.com/diy/fix-it-guy-dryer-doesnt-dry-the-clothes-3-easy-fixes