Using this heated mattress pad is easy. First, place it on your mattress, making sure it fits well up to 18 inches deep. Plug it in and select one of the 5 heat settings according to your comfort. The auto shut - off will turn it off after 10 hours for safety. When it comes to maintenance, you can simply throw it in the washing machine as it's machine - washable. However, always make sure it's completely dry before using it again. Don't worry about overheating as the pad has overheating protection. Enjoy years of use with its 3 - year limited warranty.