Although OxiClean is called “oxygen bleach,” it is actually made of a combination of dry hydrogen peroxide and sodium carbonate, which is similar to baking soda. It is less toxic to the environment and more color-safe than bleach. Powdered OxiClean is safe for use on grout when mixed with water to form a liquid or paste and applied with a cloth, sponge, or grout scrubber. Give the solution from 5 to 30 minutes to sit on the grout before scrubbing away and rinsing.