Russ Spence
Commercial Pressure Wash Expert
I will mix a "acid sprayer" with a gallon of water and 28 ounces of caustic soda beads and spot spray
I have been using a Chem called muscle magic. It is cheap and works extremely well. It might not be the most enviromentaly friends, but not washing down drains.
your a tripsorry , I am just a simple guy , its a cup , a BIG cup