If you are noticing a longer drying time, it may be time to have the vent swept. Other signs include the dryer overheating, condensation present or excessive lint around the dryer area. If you let it go too long, it can be a fire hazard, as well as a large expense to repair your dryer. Your dryer is equipped with a fuse, which will disengage the heating element in your appliance when overheated. If this happens, not only will you need to service the dryer vent, you will also need an appliance technician to repair the dryer. Many customers over the years have replaced their dryer unnecessarily as well. It could be that you just may need a dryer vent sweep.