Every time you use your dryer, you’re adding a little bit of lint to the vent. This means the dryer is less efficient at cooling down, and will take longer to dry your clothes. But it also turns dryers into fire hazards.
Along with cleaning out the lint trap after every use, don’t neglect what you can’t see. Remove the vent at the back of the dryer, and vacuum up the lint and built-up debris.
Presto! Fire hazard avoided.