About once a month, depending on the amount of laundry you do, take out your dryer lint screen. Rinse it with warm water and use a soft toothbrush to scrub it clean. The tell-tale sign it's time to soak and scrub, put your screen under running water. If it holds water, it needs cleaning. Clean lint trap every time. Wash every 30 loads. Follow mfg instructions on clothes & dryer. Use Shop Vac to suck out excess lint from under lint trap.