UDC™ ULTIMATE DRYING COMBO UDC™ ULTIMATE DRYING COMBO Drying better. The Ultimate Drying Combo ensures high drying performances on all surfaces with its perfect technological mix between standard three-stage suction motor, V squeegee assembly and a combination of blades in different materials. Applied to: CT 46 Benefits Long lasting drying effectiveness. Fitting on different floor types. Longer life of consumables (blades).