CLR was a decent product, although way overpriced, years ago when it contained phosphoric (strong) and citric (weak) acids. In an effort to go greener they've changed the formulation and gone to lactic acid as the key component which is an extremely mild, and not very effective descaler. Anyone who's used the product for a number of years will tell you it doesn't work like it used to. It just won't with the new formulation. a decent descaler, rust, calcium, and lime descaler will work in less than one minute. Soaking something in CLR for an hour or two is ridiculous. Save your time, effort, and money and buy "greener" and far more effective products.