Grout lines soak up everything: mop water, soap film, foot traffic, soil. A routine surface clean won't touch it. We use rotary pressure extraction that pulls years of buildup out in a single visit.
High-temp water and a 1000+ PSI rotary head. It pulls soil and soap film out of the grout. Dries in 2 to 4 hours.
Seals the clean grout against future staining, done the same visit. Makes the cleaning last two to three times longer.
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