I just discounted Power Clean 20% off and this special will run until Friday the 13th. Just add it to the shopping cart and it will give you the discounted price automatically. http://www.obsessivedetail.com/Optimum.html Power Clean is a great all purpose cleaner. I use it every day on tires, fenderwells, and interiors. Lately, I've noticed that Power Clean really stands out on cleaning bugs and road grime, it makes removal almost effortless. Can be used full strength or diluted down to 3:1 for tough jobs, I dilute it down as much as 10:1 for interiors.