Oreck Assail-A-Cell Air Purifer Cell Cleaner for XL Professional and Tabletop Air Purifiers Oreck Assail-A-Cell 19oz Air Purifier Cleaning Spray, fresh citrus scent Cleans and freshens air purifier metal cells without harming metal or plastic. For use on Oreck air purifiers like the XL Professional or XL Tabletop. Removes dirt, grime, dust, oil and stains from metal truman cells. Quantity discounts, the more you buy the more you save.