My water foams first thing in the morning for a few minuets, I think it's just the water thats left in the hoses. I've measured the tds and its 0. I'm not to sure why it foams but probably the same reason why a glass of water will have bubbles in it if let over night.
Question is, will it still clean glass or will it leave marks? And if anybody knows why it does it I wouldn't mind knowing that either.
Simon.