Dramatically reduce space by storing this compact box of 12 refill cartridges. Save on storage space, stay organized and save money compared to ready-to-use cleaning products. Each drop-in refill cartridge will create 32 oz. of ready-to-use cleaning product when combined with water. Bathroom. Application: Bathrooms; Dirt Types: Rust; Dirt; Grime; Soap Scum; Water Stains; Fungi; Mold; Mildew; Scent: Citrus; Physical Form: Cartridge.