You might often confuse hard water stains with soap residue. Mostly because of their appearance. But cleaning the hard water stains can be more confusing for you.

Well, we are here to take care of that headache for you. By the end of this article, you’ll surely be ready to take care of the hard water stain all by yourself.

We’ll show you how to remove hard water stains from glass , what’s causing them and help you choose your cleaning product. But first, we’ll show you the possible reasons for the stain.

So, let’s jump right in.

Causes of Hard Water Stains

Most of the time the hard water stains on your glass surface appear as white hazy spots.

You might confuse it with soap residue. You see, often the cause can be hard water splashing. You might be wondering, can there be other causes than that? Well, there are.

  • If you have your glass a defective roof drain, there’s a chance that the water leaks and leaves iron stains on your glass.
  • Your metal fly screens might leach iron on the glass
  • Sometimes lime scattering around the glass can also cause the stains.

However, all these causes can be treated and we’ll tell you how. But before that let’s have a look at the things that you’ll need.

Things You’ll Need

Before you get started with the cleaning, you’ll need to grab some essential tools and materials. Like:

Choosing Your Cleaner

It might be a lot confusing for you when it comes to choosing a cleaner. Because there are a lot of options for you when it comes to a cleaner.

So, we listed and organized all of the options that you can consider. We’ve added every information about them so that you can decide which one is better for cleaning your glass.

There are two states of cleaners. Liquid and non-liquid. However, they have more options. So, let’s start with the liquid cleaners.

Liquid Cleaners:

It’s true that liquid cleaners work better on the glass. Because they help you to remove all the dirt from the glass faster. So here are the liquid cleaner options you have.

01. Acidic Cleaner:

Your hard water stains contain alkaline. And alkaline needs a powerful acid to remove it.

You should look for cleaning products consisting of phosphoric, sulfuric, or hydrochloric acid. These acids are strong enough to take down your hard water stains.

The acidic cleaner might affect surfaces like marble, stone, polished aluminum, and colored grout. So, you should test the product before you use it.

Also, as acidic cleaning products are toxic, take precautions when you’re handling them. Or else, you might end up with a burning skin rather than clean glass.

02. Salt and Water:

This is the easiest cleaner you can make in your house. You just need to mix salt with water and that’s all. You see, your salt acts as a scouring powder and it’ll help you remove the stains.

However, you’ll need to rinse your glass thoroughly when you’re finished. Because there might be salt water left on the glass.

03. White Vinegar:

Vinegar helps you to loosen the mineral deposits on your glass. Because vinegar is a natural and non-toxic acid.

Also, as white vinegar is colorless, it doesn’t cause staining. Moreover, it won’t cause harm to your skin or eyes like other chemical cleaners.

You can also mix some lemon juice with vinegar to make it stronger and more effective.

04. Rinsing Agent:

If you’re washing your glass made dishes or glass, a rinsing agent might be a good option for you.

So, turn on your dishwasher. Put your glasses in it. Add some rinsing agent with your regular dishwashing detergent. And then see the magic yourself. Your dishes will be clean in no time.

05. Ammonia:

Ammonia is a weak base that can help you clean the stains too. You just have to mix ammonia with warm water and it’ll do the trick.

Also, you can add ammonia with your regular glass cleaner to make it supercharged. It’ll easily cut through hard water stains for you.

You might smell a powerful chemical scent from ammonia. Don’t worry, it’s quite normal in this case.

Non-Liquid Cleaners:

Like liquid cleaners, the non-liquid cleaners can also give you a clean glass surface. So, let’s learn about the non-liquid options you have.

01. Baking Soda:

Sodium Bicarbonate aka baking soda is a weak base just like vinegar in terms of popularity and cleaning ability.

You should take a scrubbing sponge and sprinkle some baking soda on it. Also, make sure that your sponge is dampened with water. This will help you to make your glass stain-free in no time.

02. Tooth Paste:

Toothpaste is often used as an alternative to the baking soda.

If your washroom glass is filled with hard water stain then this is the closest thing you might find. Use toothpaste on a clean cloth and apply it. It’s the easiest, fastest, and most effective way to remove your hard water stain.

03. Paste Cleaner:

You’ll find many commercial cleaning products that come in a paste form. The best thing about them is that the paste doesn’t leave its own stains for you to deal with.

However, there’s a downside to it too. They can leave behind a foggy haze if you don’t buff it off the glass. So, be sure that you follow the label instructions to take care of the side effects.

How to Remove Hard Water Stains from Glass

Now, if you’ve grabbed all of the necessary things and the cleaner, we’ll show you how you are going to do the cleaning.

So, we’ve organized how you’ll do it step-by-step, to make it easier for you to follow.

Step 1: Check the Condition:

Hard water stains can build up for a long time. That’s why you’ll need to check to see how bad the stain is.

Moreover, you can’t just put your cleaning products if you don’t have an idea of the situation with your glass surface. It’ll be a bald decision.

Step 2: Apply the Cleaning Product:

Now, based on your stain condition, you’ll need to apply your cleaner.

It’s better if your cleaning product is in a spray bottle. That way, you can apply it to all the places you need. You should apply it thoroughly so that you don’t miss any spots.

Step 3: Let it Set:

Next up, after you’ve applied your product, let it set there for a few minutes. We recommend you wait 5-10 minutes.

You see most of the time it’s important to let your product sit on the glass. The products react with the glass surface and make the stains easy to remove later on.

Step 4: Scrub the Surface:

You’ll need to create some action on the surface of the glass. Scrub your glass surface carefully and make sure you’ve covered all the stains.

You should scrub the surface in a circular motion. When you scrub like that there’ll be no product stains left on your glass surface.

You don’t want to have an extra headache with more stains on your glass.

Step 5: Check the Surface:

By now your surface should be clean. So, let’s give a quick check if there’s any stain left on the surface.

If you’re washing a glass door or window, you should check the corners. Sometimes the corners are not checked properly which leads to future stains on your glass door or window.

Step 6: Let the Surface Dry:

If you’re done checking, you should wait some time to let the surface dry and use a clean cloth to give a finishing touch.

You see, if you don’t let it dry, you might get cotton leftover when you finish with a clean cloth. You wouldn’t want that on your clean glass.

Frequently Asked Questions(FAQ)

01. How do I remove limescale from glass?

You just need a cup of boiled white vinegar. Then, spray it on the surface and wait for 30-60 minutes. Then clean it off. There you go, you have a clean glass surface.

02. What do hotels use to clean glass shower doors?

Well, most of the hotels use a vinegar solution to clean the shower doors. It doesn’t matter which you use vinegar or baking soda. Both will get your job done.

03. Can I use a magic eraser on glass shower doors?

Yes, you can use a magic eraser. You just need to wipe your magic eraser firmly on the glass shower door. Your shower door will get shiny in no time.


By now, you’ve learned how to remove hard water stains from glass surfaces. Not only that but also you know what cleaner you’ll need to use. We are sure that you’re more than able to remove the stains yourself now.

However, as you know glass is very fragile, you should be very careful with it. You should call the professional if anything goes wrong.

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