One way to solve the problem of moisture is by using an airbrush with a built-in spray gun. This will allow you to control your spraying better and have less chance of over-spray--not to mention it'll also make cleaning up simpler, too! Another idea is using an AC/DC-powered dehumidifier for indoor use--or even buying one that's designed specifically for drying out art supplies like paint or adhesives if need be. Just keep in mind that these could take anywhere from 24 hours to several days before they start working properly--so don't expect overnight results if you're going this route!