Deep stains are tough to get out

you can kind of see the stains on the bottom of the glass but the whole window was stained and I just got through using the machine on it for 2 hours. The bottom stains that run about 3 inches on the bottom took me an additional hour to get out but I did it. yahooo!

wow, you spent 3 hours on one window? was it worth it?

in the short run, no
but in the long run, yes

This is the first waterspot removal job I have gotten and after 4 years doing window cleaning Im glad I finally taken the step to add waterspot removal to my services. I was afraid of this service because I did not know a thing about it but since another local window cleaner was moving and was selling his equipment he encouraged me to buy it from him and he showed me the basics.

After much research on the internet and some advice from kind members here in wcr I am pretty confident in doing waterspot removal.
The key now is to improve my efficiency. That first window took me 3 hours, the same sized window next to it took me 2 hours.

There are 2 more other windows that I have to go back and do so Im hoping I can improve to 1.5 hrs. I think a veteran would complete it in 1hr, thats my goal

I am moving towards this as well. Been doing cleaning of homes for going on 10 years and Have a list of houses that were pretty bad. Most were rentals and bad sprinklers. Daily watering and bad spray heads with this heat has done a lot of damage. Now, the folks are not willing to pay to have cleaned but they won’t mind me “practicing” on a few windows. I have a few homes that I can try methods on to see what works at my leisure. I may do a bad one or an area and let them see the difference. My argument to them is why replace the windows when I can save them money to fix it. You wont pay for a clean but will pay for replacement? I just want the practice and try out different methods. Sort of goes along the line of my wife calling her company the Magical Hands. I walk up and the problem magically disappears.

1 part vegetable oil
2 parts baking soda

Mix together with a spoon and go crazy! I like to use my fingers when I use baking soda (ie. Miracle Cleaner) because I feel like I can really work the fine grains of baking soda into the surface best that way. But you can certainly use a cloth or a sponge if you prefer to keep your hands mess-free.

How do you apply it?

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Was that the Glass-Renu you were using?

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