Crushed Flex Hose
This image shows very clearly how the dryer can get moved back too close to the wall and crush the exhaust hose. This situation is very common. It not only increases dryer times and shortens the appliances life-span; it also creates a very real fire danger.
Normal dryer operation creates vibrations that move the dryer back. Just closing the front door can also contribute. And, there's the natural tendency to push the dryer back so it lines up nicely with the washer. Keeping an eye on the exhaust system is an important fire prevention tactic, and it is one that the LintAlert® does automatically, all the time.