Almost all cooler bags are not machine washable. This means that you’ll have to hand wash them when they get dirty. Most of them are easy to wipe clean as long as you’re doing it regularly. If you need a more thorough clean, you’ll have to soak it in water with dish soap. The only issue with this is that it will take some time to dry. If you keep up with the spot cleaning, you shouldn’t need to soak it very often.