If you're spraying with hybrid makeup, simply soak your stencils for a few hours in a zip-lock bag containing alcohol or even Windex. Wipe them down afterwards and store them away until the next job. When using with water-based makeup, spray and wipe with any household window cleaner. If you have a Sonic Cleaner (found at www.harborfreight.com) you can clean them faster with that - you may need a little scrubber brush for those stubborn spots.