The HotTub Serum Triple Action Spray Cleaner is a spa surface cleaner that will keep the shell, cover, headrests and stairs of your hot tub sparkling clean and precent musty smells that can build up on surfaces of the spa. This will efficiently stop spas from forming mold and mildew than can start from things a simple as still water, surface odors and staining. Use this Triple Action Spray Cleaner frequently when the spa is in use to treat the “tidal zone”, cover, and headrests without having to drain the spa.