I've had the best luck with soaking my towels overnight. I use about 1 oz of the cleaner with 2-3 gallons of warm water, soak overnight, wring out, and wash with a fresh 1 oz and warm water, then hang to dry. When you pour out the soak bucket water, there's always a TON of black goo in the bottom...perhaps I should soak with a grit guard in there!