Once every two years: clean dryer vent and ducts
Cleaning your dryer’s vent and ductwork helps prevent lint build-up from obstructing air flow and impairing your dryer’s performance. Unless otherwise instructed in your owner’s manual, clean your dryer’s venting at least once every two years. You may want to clean it more often if you notice your dryer starting to struggle with drying loads.
After every load: clean dryer lint screen
A screen blocked by lint can increase drying time. It is important to clean your lint screen after every use. Locate your dryer's lint screen, which is most likely near the dryer door. Remove the screen by pulling up, then gently remove the lint from the screen by hand and put the lint trap back. Wet lint is harder to remove, so don't scrub or use water.
Every 6 months: deep clean lint screen
The laundry detergent and fabric softener that builds up on your lint screen can increase drying time. If you notice lint collecting on areas of the screen or plugging the mesh, the screen may be more difficult to clean by hand and could result in having to fix your dryer if not properly cleaned regularly.
To deep clean the lint screen, roll lint off, then wet both sides with hot water. Scrub with a nylon brush, hot water and liquid detergent to remove buildup. Rinse the screen with hot water and dry thoroughly.