i still get water marks on windows

[dave app]

Hi

im just getting in to window cleaning and im getting water marks on the windows. I have a R O and resin system and making my own water. any tips please

 

[Algie]

Hi

im just getting in to window cleaning and im getting water marks on the windows. I have a R O and resin system and making my own water. any tips please

Is your water at 0 ppm ?

Are you rinsing the glass well after cleaning ?

 

[Perryb91]

If the frames are clean, and your waters pure after the first initial clean could be your rinse. If the glass hydrophobic? Knock your flow rate up and get it a really tight rinse, go do the backs and come back to check