Hi we use RO to produce water and then polish the water. The RO water is usually 3-7 tdsCan this be used to clean windows! I hear of people saying we use up to 20 tds and cleans fine? Reason I ask is because our DI hasn't had the resin changed for over two and half years. Going on my calculations. It is due to need changing soon. So just wondering
Lol just that it's take 4 men to lift that Di lol!