It doesn't hurt every few years to pull out the drum and check for lint accumulation too, DD's had singed lint back there, and it wasn't caused from not emptying the lint screen, just years of use. Also check your vent hose too, as it can also accumulate at the dryers opening, and back inside there. That is a great tip on cleaning the screen. A little dishsoap and a brush cleans them up nicely :D:D:D