 Next, let's talk about the dryer lint filter. You need to clean this every time you use that dryer to prevent fire hazards and maintain proper airflow. But don't forget to inspect and clean the dryer exhaust vent at least once a year to keep that dryer running efficiently. Now, let's add to that list with the refrigerator water filter. If your fridge has a built-in water dispenser or an ice maker, it very likely has a water filter that needs regular replacement. And typically, that's about every three months, some months.