A clogged dryer vent is as dangerous as a fireplace with a blocked chimney. If the dryer pipe is clogged, chemical lint and carbon monoxide will back up into your house, and can start a house fire. Nearly 17,000 fires start from clothes dryers in homes each year!
EVERY DRYER MUST BE CLEANED ONCE A YEAR.
Even if you just purchased and installed a brand new dryer machine, that doesn't mean that the exhaust pipe is clean. New machines produce more heat, which actually increases the risk of fire or your dryer breaking if there is debris in your vent. You are responsible for the cleanliness of your dryer, so the manufacturer will waive their warranty if this happens. Don’t rely on delivery and installation technicians. They don’t care about the condition of the exhaust pipe. They don't inspect or clean it for you, simply because you don't pay for it!