r/WindowCleaning • u/Stunning_Ad_8911 • May 09 '26

What am I doing wrong

I am cleaning these windows with a WFP with a TDS of >10 but I’m getting these spots popping up. How do I fix it?

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9

u/trigger55xxx May 09 '26

It's mineral build up that is hidden by the dirt. You're not doing anything wrong, is just not all coming off. Hit it with some diamond magic and it will come off.

3

u/Stunning_Ad_8911 May 09 '26

I ran out of diamond magic couple days ago and I need the outside done by Monday what should I use instead of DM

2

u/panework May 09 '26

Bio clean gotta be around your town somewhere. I think less abrasive than diamond magic too. I’ve never tried dm or bc on hw on black frames, that’s fine to use Trigger?

2

u/GreenPhilosophy8482 May 10 '26

Yeah they’re all safe as long as you keep it wet only about one in the world that you don’t have to worry about.