Hi, I received this info via e-mail and it is worthwhile to pass on. It is necessary to take out your vent from your dryer and scrub at least monthly..I just did after 9 yrs of use.Ha.Ha. The dryer sheets leave a chemical that eventually builds up on the vent and prevents it from releasing the heat outside or wherever, as it should. Remedy; take out the dryer vent after cleaning our the lint and scrub under hot water with a brush and soap, and rinse and rinse until water flows freeley and all of the lint is out even under the edges. Try it. it works..could prevent a fire or that built up burning smell you get every once in a while..Orval is currently cleaning out the whole venting system---He's a good man. I've got to get to bed. Love and prayers for all..I still need MORE ENERGY. If anyone finds mine, please send it back and don't get mono even once let alone twice!! Hugs and prayers for all, Princes Kathleen, the now very tired princess. hope there are no peas under my sheet or mattress tonight!!!