No More Chemical Residue on Windows with a Cornstarch Cleaner

Updated on April 27, 2023 by Joseph D. Nielson

Table of Contents

Woman in Black Shirt Holding Blue Textile Near Window

Are you looking for a DIY glass cleaner that won’t leave behind chemical residue? If so, then you’ve come to the right place! 

Using just everyday kitchen staple, cornstarch (that’s right, the sauce thickener!) and water, you have the perfect window cleaning solution. Unbeknownst to many, cornstarch is a natural and non-toxic product that can clean windows without needing to lean on harsh cleaning chemicals. Plus, it’s much more affordable than store-bought window cleaners. 

So, if you’re looking for an effective and affordable way to keep your windows clean and streak-free, then a cornstarch cleaner is the perfect choice for you! Read on to learn how to make your own cleaner at home.

Making your own window cleaner with cornstarch can seem like a daunting task at first. After all, it’s not something that many people have done before — won’t it make a paste-like mess!? Don’t worry! It’s actually quite simple and straightforward. The only (very minor!) challenge is finding the right ingredients and supplies to make your DIY cleaner. Luckily, you won’t need much. Just a few basic tools and ingredients will do the trick!

It can be a real challenge to find a reliable window cleaner that won’t leave behind any chemical residue. Follow along as we provide step-by-step instructions on how to create an effective, eco-friendly window cleaner that won’t leave any streaky residue behind. Armed with the tips and tricks from this blog post you’ll be able to get your windows sparkly clean in no time — making you the talk of the town, and the whole neighbourhood envious.

What You Need

First, make sure that you have all the necessary ingredients and supplies to hand (it shouldn’t take too long!).

Ingredients needed your DIY cornstarch cleaner

Basic cleaning supplies necessary for window cleaning

Grayscale Photo of Woman Wiping the Window

Steps to Making the Cornstarch Cleaner

Step 1: Gather all necessary ingredients and supplies

Begin by gathering all of the ingredients and the supplies from the list above. A reminder that you will need cornstarch, water, rags or paper towels (rags are the more environmentally-sound option), a bucket of warm water, and a sponge or cloth. Once you have everything gathered together, you are ready to get mixing!

Step 2: Make a paste using cornstarch and water

In a medium-sized bowl, mix together equal parts cornstarch and water to make a paste. The consistency should be thick, but not overly so. If it is too thin, add more cornstarch; if it is too thick, add more water — repeat this process until you get a nice smooth right consistency. 

Once you’ve found a good balance of each, it is time to move on to the next step — cleaning your windows using your DIY household cleaner!

Step 3: Apply the paste to the window with a cloth or sponge

Using a cloth or sponge, apply the cornstarch paste to the window in a circular, buffing motion. Make sure that you cover all areas of the window completely and that no part is left untouched. Then, allow the paste to sit on the window for a few minutes (set a timer so that you don’t forget about it) before moving on to the next step.

Step 4: Scrub the window with a sponge or cloth, making sure to cover all areas

Once the mix has sat for a while, go back with a clean cloth and gently buff away at the windows. Make sure every area has been covered, paying special attention to the corners and edges (where dirt and grim tend to accumulate).

Don’t forget to clean the interior and exterior! If you need to use a ladder, remember to get someone to spot you and to follow ladder safety rules. Once you are finished, use another clean cloth and wipe the window with warm water to remove any residue.

Step 5: Dry the window with a rag or paper towel

Once the window is clean, use a rag, a paper towel or a clean cloth to dry it off. Make sure you wipe away any excess water, as this will prevent streaks from forming on the window. For an extra shine, you can also buff the window with a piece of old newspaper. Voila! Your windows should now be streak-free and sparkling clean!

Tips and Tricks

  • For tougher stains, let the paste sit on the window for up to an hour before scrubbing — just don’t forget about it!
  • Add a few drops of essential oil to the paste for a pleasant scent.
  • For extra shine, repeat the process.
Wooden lounge overlooking calm sea


Making your own window cleaner with cornstarch is an easy, affordable and chemical-free way to keep your windows looking clean without leaving any nasty residue behind. Using just a few basic ingredients and supplies, and by following the speedy tips in this post you’ll have shiny windows in no time. So don’t wait any longer — get cleaning today!


Q: How often should I use the cornstarch cleaner?

A: Depending on how dirty your windows are, you can use the cleaner as often as needed. If they are just lightly soiled, a monthly cleaning should do the trick! If you’re by a busy road which will see pollution, bi-weekly should work.

Q: Is this method safe for tinted windows?

A: Absolutely! The cornstarch paste is perfectly safe to use on tinted windows. We just advised that you use a gentle cloth and don’t scrub too hard, and always rinse with warm water after cleaning.

Q: How do I avoid streaks?

A: The key is to make sure you dry the window completely after cleaning. This will prevent any water spots or streaks from forming. You can also use a piece of old newspaper to buff the window for extra shine!

Joseph and Family
About Joseph D. Nielson

Former journalist and editor for various press groups, I now dedicate my time to reviewing products for the home and family life. When I get time to myself, I enjoy rock climbing, taking my dirt bike for a rip, and most importantly providing my family with the best home possible!