 Also that you're checking the exterior of your house. And that is that in the fall, there can be leaves that block that exhaust, which can cause lint to build up. There can also be, and if you are in a cold weather state, you may have snow. So making sure you're checking anytime you have weather around that vent, but also just make it a practice every time that you use your dryer, that you clean out that dryer vent.