Just to clarify, when we use folex either on our automotive interiors at work, or on the carpet at home, after the product is applied, either manually, or as Jonna indicated, with a carpet machine, (I did this a few weeks ago) the solution is either worked into a spot with your fingers, or a brush, and then removed either with a shop vac, carpet machine, or in the instance of a small area, with a towel, the area can also be rinsed with water afterwards as well. We have never just sprayed the product and let it soak in with out removing it, that way there is no leftover residue.
Greg