It's important to clean your tent on a regular basis. How often you need to clean it depends on how often you use it and how dirty it gets. If you only use your tent once or twice a year, then cleaning it once a year should be enough. However, if you use your tent more frequently, then you'll need to clean it more often. If your tent gets really dirty, you can wash it in a front loading washing machine. Just be sure to follow the instructions carefully so that you don't damage your tent.