Granite is a strong stone that requires very little maintenance and holds its appearance for years in most cases. However, as pollen, rain and other outdoor elements collect on exterior granite, you will want the most effective and safe cleaning routine to remove residue without damaging the granite.
Fill one bucket only with hot water, and fill the other bucket with 1 gallon of hot water and 2 squirts of a low pH dish soap.
Dip your cleaning rag into the bucket of soapy water, and wipe the granite. Remove tougher residue and clean between cracks by dipping a soft scrub brush in the soapy water, and scrubbing the granite. Clean a 2-foot square section at a time.
Dip another cleaning rag into the bucket of plain water, wring out and wipe over the granite you just cleaned with the soapy water. This will remove both the soap and the residue that was lifted from the granite.
Repeat until the entire surface is clean. Allow either to air dry or polish by wiping dry in small circles with a fresh cleaning cloth.