The vents on the back end of your blowdryer can get clogged with hair and dust. This will shorten the life of your dryer – and possibly create a safety hazard- because the motor has to work harder to stay cool. The solution for this is to periodically clean your blowdryer.
The next time you are vacuuming your floors or carpet, take a couple of seconds to clean the vents on your blowdryer. Give them a quick pass with the nozzle of your vacuum to remove any buildup.