Scrubbing Bubbles ® Super Concentrate Bathroom Cleaner Kit. RTD ®. Ready-to-Dispense (RTD ®) is the maintenance-free dilution control system that's built right into the bottle. Simply attach a hose and you're ready to dispense! Removes mold, mildew and soap scum stains from showers, doors, porcelain, counter tops, bathroom fixtures and more. Kills odor-causing germs, staph and athlete's foot fungus. Economical 1:64 dilution makes 14 ready-to-use 32-oz. bottles. Requires Water Hook-Up Kit SKU#352651 (sold separately). 1.5-liter bottle. One bottle of cleaner and two labeled 32-oz. trigger sprayers per case.