Prahston, I just looked up the TufCloth instructions on their website. They say either TufGlide or mineral spirits to refresh a TufCloth. I have been using mineral spirits because the cloths felt a bit dry and I wanted to avoid more oil (even tho I have a lifetime supply of TufGlide due to an ordering "mishap" several years ago). The website does say TufCloth is non-toxic to the extent that knives wiped with it can be used for food preparation.