Make sure that if you're using a spray with water in it, you're going to want to add a preservative. Don't want to be spraying mold or other nasties around your room, too. Vinegar can grow mold in it. I did an experiment a year ago after someone said that vinegar would preserve water based products. I put water and vinegar in a clear clean bottle and left it sitting with a cover on it (not air tight) and after 3 weeks there was mold starting to grow in it. Eww!