Guys not going into the chemistry of the fuel used here ..... all the cleaners available in marked do their job. I would like to mention where it takes an edge over its completitiors. This is a very intellgent design , a very easy to use applicator with an additional compartment to store a piece of cleaning microfiber/chamois cloth. Mine came out adequately wet to clean the strings , though i bought an extra string fuel refill . Highly recommended product. Go for it !