While it's a good idea to vacuum your carpets at least once a week, it's even more important to clean your vacuum cleaner at least once a month. All of the dust and residue can clog the filters and even damage your vacuum's motor over time. When you do clean it, make sure you take out the filters and clean them. You can easily clean your filters in the dishwasher, or you can use warm soapy water and a little rub.