Makes one gallon.
Optional: You can add some blue food coloring if you like!
Be sure to label the container as this will be toxic for the little ones.
Rubbing alcohol costs 99 cents for 16 oz. (2 cups), thus 3 cups rubbing alcohol would cost 1.49 plus the detergent. Windshield washer fluid is usually on sale for 99 cents or less. (12/13/2004)
Gas Stations gouge for up to $5.00 bottle. Great recipe if you need some quick until you can get some 99cent bottles (01/26/2005)
I have a question. I live in Canada, where it can get very cold. Would this be suitable for winter (-45 degrees C.), or is it just for summer? (02/21/2005)
The alcohol should keep it from freezing. You might want to put in more rubbing alcohol. Try making some, letting it sit outside and see if it freezes (make sure it is not open so pets or animals can get into it.) If it does freeze, add more alcohol. (02/21/2005)
Very simple. Isopropanol (aka rubbing alcohol) is not in most washer fluids anymore, and yes it does prevent freezing. Like antifreeze use more in colder climates. The isopropanol also is a great cleaner for glass, and does not streak. You are paying for colored water now, and 99 cents for water makes NO sense. Simplest way is take 1/2 bottle of Walmart brand for Windex and add the rest water, depending on how dirty your windshield gets. Ammonia does a great job also, but diluted. Yes you can safely combine isopropanol and ammonia in same container without any hazard. And now you know. (03/15/2005)
By the wisdom
In Holland we pay $4 for 33 US fl oz (my conversion) which we can then mix with water. I understand in the UK we can use Meths (Methanol) or in Holland Spiritus - actually anything which'll work in a fondue burner. (02/14/2006)
How many of you that are telling us about how to make homemade windshield washer fluid have actually tried it, and are you really saving any money than buying it at say walmart or k-mart for a little over or under a dollar? if im trying to save money by making my own and your not, then what would be the point of this? (03/04/2006)
Rubbing alcohol may be great for glass, but it can deteriorate rubber hoses with continued use. (08/20/2006)
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