Yes, you can wash the shark dust cup. You can either hand wash it or put it in the dishwasher. If you hand wash it, be sure to use a mild soap and warm water. Don't use any harsh chemicals or scrub too hard, as this could damage the cup. If you put it in the dishwasher, just use the regular cycle and don't worry about being too gentle. The cup will come out clean and ready to use again.