Hi guys, a while back I was moaning about spotting on my windows when testing. So I got an 11ltr resin vessel, and that brought my TDS down to 000, re tested on the same spotty window and also did a test on my other windows.
This mornings result on the spotty window is that its still spotting, the other windows however seem to be ok, only the odd slight spot here and there

At about 4am this morning I remembered something.... I'm sure I used "Rainex" on the spotty window about 2 years or so back... It's the only thing I can think of and that where I'm going to have to leave it I think, would be handy if I could find a way to resolve the spotty one though, any ideas chaps? 000 wire wool might be an option to test I think.
Gav