My clothes take at minimun 2-cycles to dry.  The vent is clean (we checked) and the exterior is not all clogged up either (like in your photo).  The vent hose does, however, extend over 25 feet to the rear of the home (in the ceiling) where it then reaches the exteror.  Would that cause the longer drying time?

Most dryer manufactures limit the ducting to 25'. However on your set up you probably have 3 90's which add 5' each that makes it 40'. Check the manufacture limit on venting, but that will cause longer drying times.

Also there is a thermocoupler that may not be working properly check your dryer temperature.

One other possibility is that you have an "energy efficient" dryer.  These dryers rely more on air than on temperature to dry clothes, so they take longer to dry.

One other possibility is that you have an "energy efficient" dryer.  These dryers rely more on air than on temperature to dry clothes, so they take longer to dry.

One other possibility is that you have an "energy efficient" dryer.  These dryers rely more on air than on temperature to dry clothes, so they take longer to dry.

Dave

We got it the fist time, sheesh. 

The only problem that I see is not enough combustible air.

LOL

Lengths of allowable dryer vent pipe varies greatly from manufacturer to manufacturer.  I think as a general rule with 2 90 degree elbows I wouldn't want to see more that 20-25 feet of pipe----and it better be smooth wall and insulated.  Any amount of flexible pipe is going to bring this length down even more.  It is actually surprizing to see how different the manufactuers are. For example one super-duper GE model (electric) allows 90 feet with no elbows, 60 feet with 1, 45 feet with 2, 35 ft with 3, and 25 feet with 4.  Sorry---but no easy answer if you are looking for one:)

It could also be an older dryer wearing out.  We recently changed dryers and the new is so much faster then the old one it isn't even funny.

Some very good responses.  The point is this...the dryer is one of the most utilized components in a home.  Homeowners need to be reminded of both proper installation and routine maintenance to ensure a safe and efficient operation!  Good responses everyone.

Dryer vents are one of the most commonly improperly installed items in a home. Even new home builders do not generally do a great job of routing and ducting. Generally, anything over 15 feet of  length is taxing to any dryer, and may be the limit for some cheaper models. Avoiding bends of any kind is always preferable when routing a dryer vent, because wherever there is a bend, there is also potential for lint and moisture accumulation.

Gary: I build speck homes and one thing I always remember is to ask where is the dryer vent? Then I get that blame game of who was supposed to do the dryer vent. I just want the vent I don't care who does it.