The diluted product along with the undiluted product is stored in a dark closet. What is strange to me is it's only the diluted product that turns brown. The undiluted jug has never turned brown, and...
Does anyone know why Meguiar's D120 Glass Cleaner Concentrate turns brown, and the bottle turns brown, after being diluted? This occurs approximately 3-4 weeks after being diluted. Does this mean the...