Regina / Oreck Full Release Carpet and Hard Floor Cleaner. Full Release Carpet and Hard Floor Cleaner. This self-contained, easy-loading 16 ounce cartridge of specially formulated carpet and hard floor cleaner work with the all models of the regina steamer machines. Upholstery Shampoo also Available. Each 16oz. Concentrated cartridge will clean approximately 220 square feet of carpet depending on personal cleaning method.