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Window cleaner leaves strikes ????
Hey there,
I have been trying to create a windows and glass cleaner, but I am constantly getting problems with slight streaks that are visible whenever you look through glass directly at the sun.
In general, the formulation is
2% alcohol isopropyl
2% butoxyethanol
0,2%-0,5% surfactant (I have tried many like Capryl/Caprylyl Glucoside, decyl glucoside, SLS etc)
x% waterIt’s slightly better if I don’t use any surfactant, but still there are some streaks.
I have a feeling that there is some antistatic ingredient missing.Any idea? Thank you so much!
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11 Replies
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Is your water deionized? Salt content might be creating some streaks. Certain non-ionic surfactants are also recommended for window cleaners (ex Tomadol 901). What pH is your current formulation at?
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Well, it’s a concentrate that you dissolve in tap water. Do you think using chelator might resolve the problem? What’s the best chelator and how much to use?
MGDA would be ok?
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I am for about 7 pH. Any suggestion about pH? Thank you!
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Try adding some chelants, like MGDA or GLDA. You shouldn’t have any issue with glucoside-based surfactants at low level.
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Well, it’s a concentrate that you dissolve in tap water. Do you think using a chelator might resolve the problem? What’s the best chelator and how much to use?
I have MGDA in powder. I will check it out.
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Please determine if distilled or deionized water shows the same problem.
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try adding small amounts of sodium carbonate and citric acid
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why would I do that?
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@doodle cricket Please check to see if the issue persists in water that has been distilled or deionized.
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it does. Maybe the rubbing alcohol I had access too wasn’t pure as claimed.
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I’d add a chelant (like disodium EDTA) and keep the surfactant level to a minimum.
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