What Causes Film On Inside of House Windows

When you start to maintain your property, you may find a film on the inside of the house windows. And, you may be blocked in your view of this thick film and have no idea to solve this problem. Then, in this post, the author would illustrate what causes a film on inside of residential aluminium windows and how to prevent it.

3 Reasons to Cause Film On Inside of House Windows

As a specialist in house windows, we summarize three reasons that cause the film on the inside of your house windows.

●Old age

The first and primary reason why your house windows have film is the window is getting old and the hardware also becomes less sturdy, as time goes by. It is because the frequent use of the windows would cause a deterioration of the double pane window seals. Then, as time goes by, the performance of the window also gets down.

●Exposure to water

The water is the second aspect that causes film on your house windows. When the window components are sin into the water, the seals may go bad, because the water has a strong permeability and the water would get moved off the sealing material.

●Excess heat

The excessed heat is the most direct aspect that affects the performance of your house windows. Due to the basic principle of heat expansion and cold contraction, if you live in a place that has extreme heat conditions, the extreme heat would cause seals surrounding window panes to stretch. Also, under exposure to heat, the sealing material also goes bad and even breaks down, the moisture can escape from the window panes. As a result, you will see a layer of film inside of your window.

How to Remove Cloudy Film from Your Windows

To remove the cloudy film from your windows, you can follow this method.

Step 1: Prepare the Necessary Materials

You'll need white vinegar, water, a spray bottle, a clean microfiber cloth or lint-free paper towels, and a scraper or razor blade (optional).

Step 2: Create A Cleaning Solution

Mix appropriately white vinegar and water in a spray bottle. Vinegar is effective in removing mineral deposits and stains from glass. An ideal appropriate proportion is 2 cups of white vinegar, 2 cups of water, and 5 drops of concentrated dish soap.

Step 3: Spray the Cloudy Windows

Spray the vinegar and water solution onto the cloudy areas of the window. Ensure that the surface is adequately dampened but not dripping wet.

Step 4: Let the Solution Sit

Allow the vinegar solution to sit on the windows for a few minutes. This will help loosen and dissolve the cloudy film.

Step 5: Wipe the Windows

Take a clean microfiber cloth or lint-free paper towels and gently wipe the windows in a circular motion. Start from one corner and work your way across the entire surface. Apply gentle pressure to remove the film but avoid scrubbing too hard, as it may scratch the glass.

Step 6: Wipe the Windows Again

For stubborn cloudy films, you may need to repeat the process a few times. Be patient and persistent.

Step 7: Rinse and Dry

Once you have removed the cloudy film, rinse the windows with clean water to remove any remaining vinegar solution. Then, use a dry microfiber cloth or paper towels to dry the windows and prevent streaks.

Step 8: Use A Scraper (If Needed)

If there are any stubborn residues or mineral deposits that are difficult to remove, you can carefully use a scraper or razor blade. Hold the scraper at a slight angle and gently scrape off the residue. Be cautious not to apply too much pressure or scratch the glass.

How to Prevent Film On Inside of House Windows?

If you don’t want to spend too much time on cleaning, you can take some preventive measures to prevent the film occurs. In this section, the author would list some tips to guide you prevent the film.

●Correct installation

The first method is to ensure your house windows are correctly and appropriately installed. The correct installation of your house windows could ensure your house windows can greatly implement their performance as possible.

●Get rid of moisture

As above mentioned, moisture is one of the director factors causing residential aluminium windows. Therefore, you can use a dehumidifier to remove excess moisture from your house, so as to let the wet air away from the windows.

●Ventilate your home

You can choose the aluminum window energy efficiency which can prevent the windows from losing heat or gaining heat.

●Add window protection

Adding a layer of thin film to help adjust the temperatures of the residential aluminium windows. Also, this layer of thin film prevents moisture in your windowpanes.

●Inspect your windows

The inspection is necessary to implement because it could let you know the actual situation of your window.


At last, once finding the film on your house window, you should pay attention to the humidity of your house, because it is the direct reason that causes the film. And, you also need to regularly check the residential aluminium windows to find out whether they have good sealing performance.