Problem-Mother in law's dryer not working well-she needs a new dryer-takes 2 or 3 cycles to dry a load of sheets. I suspected fabric softener clogged lint screen and/or clogged venting, noticed she has big supply of BOTH liquid softener and dryer sheets, DOWNY and BOUNCE,-we had both problems-hot water detergent scrub and forcing brush bristles through the screen mesh fixed the screen. Disconnecting the exhaust I found dryers outlet TOTALLY lint plugged-compressed it made a softball sized piece of softener infused nastiness. After 4 or 5 rounds of electric leaf blower in the vent ducting, + or - 25 feet, alternating with pulling wads of lint from the exterior hooded vent-one of those 45 degree max opening flaps, we finally have air flow to the outside. Altogether there was about 1 1/2 gallons of lint. No need for a new dryer now but I still smell like fabric softener. I hope it isn't the 2 weeks of freshness variety!