If you have any stains, simply sprinkle club soda directly on them and clean with a sponge. I did not have any bug spray, and I was too lazy and too cheap to go to the store and buy any. Some particular models of nebulizers also have distinct features that give them more advantages over nasal sprays or even other models of nebulizers. This should only take a couple of seconds, but prevents damaging your equipment before it has even been used. cause (my review here)