Removing Hard Water Spots on Windows

Category Windows


Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

March 10, 2015

After using a siding cleaner last summer I have noticed what appears to be window streaks. It looks like a trail of water has run down the window. Any ideas on how to remove these?


By Robert


December 4, 20170 found this helpful

The best product ever is good old vinegar and water. Use a newspaper to clean the window with the solution and wipe it clean.

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December 5, 20170 found this helpful

I use vinegar and water with a couple of drops of Blue Dawn. Use a microfiber cloth and no streaks.

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February 5, 2015

How do you remove water marks on the exterior side of house windows?

By Dave


December 3, 20170 found this helpful

Windex, but if they have calcium deposits, use vinegar and rub with newspaper,

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December 4, 20170 found this helpful

I make my own cleaner. 2T ammonia, 2T vinegar, a couple of squirts of Blue Dawn.


Put all in a spray bottle and fill to the top with warm water.

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November 10, 2010

How do I remove hard water spots on vehicle windows, that have been driven and exposed to all sorts of elements? Besides hard water stains, there are other unknown spots. Thank you.



November 13, 20100 found this helpful

Vinegar. I use it in my dishwasher and on my stainless steal sink. What a difference!

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October 20, 20171 found this helpful

All different answers here! Sadly, none of them worked for me. I have Marvin Windows which rot, but that is another story. Can't use even a green scrubber pad on these awful Marvin windows as the teeniest, tiny abrasive scratches them forever.


Step 1
But the list inspired me.

Step 2
After trying most of the remedies with absolutely no results...I even tried hydrogen peroxide.

Step 3
Then I had a ureka moment. Maybe lime could be the antidote to hard or mineral water stains. After all, it's in one of those cleaning products you pay for that contains mostly water.

Step 4
I have a 40 pound bag of powdered lime in the garage. You know the kind you put on your garden? It cost about $4 last spring at that big store everyone complains about but frequents due to the prices.

Step 5
I put some powdered lime in a mason jar with a little water and stirred with a chopstick to make a paste. You can stir with whatever you want, but this is a good excuse to get Chinese food!

Step 6
The paste tends to harden up after a while, but just add more water. I rubbed it around on a small area of spotting. It doesn't have to go on thick, the paste is just a method for getting the lime to stick on the window.


Step 7
It was about time for my mid morning coffee break so I did that.

Step 8
When I came back, I used a soft rag to buff off the dried lime. To my shock and amazement, the glass was spot free and shinny as a new penny! And, no window scratches! The area I hadn't treated stood out with nasty spots.

Step 9
Here are a few things you might want to know.

Step 10
I used disposable gloves when handling the lime and paste, and even the buffing. Be careful to avoid inhaling the lime before you put water on it.

Step 11
Don't use pelletized lime unless it makes a paste, if you spread particles from the pellets on your windows, you may scratch them.

Step 12
I used damp paper towels to spread the paste. The lime will harden on the towel very quickly. I just dumped it back in the jar. Don't put the paper towels in the trash, put them in your compost or bury them in your garden. If you use rags to can use paper towels for this as well..wash the rags at an outside faucet. I am not sure what lime does to the benificial microbes if you have a septic system.


Step 13
It works much better if you apply the paste and let it sit a while. If some of the spots don't come off on the first go, try again. I did that and it worked. Maybe I didn't get enough lime on them the first time.

Step 14
I would be thrilled to hear how it works for others as this is the first time I have posted on a site like this. Good luck!

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October 4, 2015

How do I get lime off windows?


October 13, 20170 found this helpful

Try Barkeeper's Friend

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There are so many Scrubbing Bubbles products - which one do you use with the fine steel wool?


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July 29, 2013

I have parked my car below a water tank. Once the water tank filled; the extra water will fall on the car. So salt water deposited on my car. How do I clean salt deposits off my car?


By N Senthil

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ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

November 6, 2010

I have water marks on my windows and can't seem to get rid of them. There is also a substance that I think is paint, but I am not sure.

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July 13, 2010

How do I get hard water stains off a window? The sprinklers hit it and there is a mark.

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March 23, 2010

There have been a lot of great answers for how to clean shower glass, but I'm concerned about how some of these suggested cleaning agents will react with rubber and auto paint.

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October 22, 2006

How do you remove hard water spots from windows?

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August 25, 2006

At my model home, the irrigation system sprays the windows and the storm door on the front door. They are all covered with hard water stains.

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