You should be washing your boat often. Every time you use your boat, you should wash it and clean the interior. If you don’t use your boat for a month or so, you still need to wash it, to ensure dust or debris doesn’t collect on it. It’s good to get in the habit of washing your boat regularly, including washing the windows, and flushing your engine. Remember, to wipe out cup holders, wipe out storage areas, and clean the floors as well.