Power scrubbing can clean and restore grouted tile floors neglected by ordinary nightly mopping. Power scrubbing process removes years of built-up grease and dirt that has been liquefied and imbedded into the grout. It is an economic way to clean parking garage without using excessive water. Scrubbing combined with pressure washing can remove oil and other debris. Scrubbing is also great for garages that do not have a good drainage system.