[header] How to clean quartz [title] Rinse the quartz off with a power washer. [step] If you have a large amount of quartz with a heavy amount of mud or dirt on it, you can try to rinse it off with a power washer. Set your quartz on the ground (preferably on concrete or asphalt) and rinse off the dirt. 
Using a power washer is more efficient, but you can also use a hose. You can also go to a coin operated car wash and wash your quartz there with their pressure washers.