Not too sure if it's me or others here, but after many years with different things to stop incorrect readings from machines is just water! but even then, I still get incorrect readings from the machines, so I would still say trust nothing! Also why are we talking about buying these Items they are and should be free on the NHS we have always have had things to keep us safe and these are needed to keep diabetics safe. I would say alcohol free wipes are the best out of them all. Diabetics get free prescripts for everything needed for us to keep alive!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! So please stop saying buy them! And request None alcohol from your GP I'm talking about U.k Here as are system is different then the rest of the world!