To successfully stop mildew from forming on your home's windows, you will need to take preventive measures. Following these steps to put an end to window mildew.
Step 1 - Regular Cleaning
While it may seen obvious, regularly cleaning your home's windows is a great way to stop mildew. At least once every other week, spray your windows with a commercial mildew cleaner and thoroughly wipe them down with a sponge or washcloth.
If you're uncomfortable with the potent chemicals found in many commercial cleaners, you can use common household items to make your own highly effective, all-natural mildew cleaners. A mixture of boiled milk and warm water is one of the most popular and easily-produced makeshift mildew cleaners and is particularly effective in combating powdery forms of mildew. Alternatively, white wine vinegar and warm water are effective in combating larger mildew buildups.
Step 2 - Low Humidity
Mildew tends to thrive in enclosed, humid, poorly ventilated environments, which is why it is typically found in bathrooms, attics and basements. Thus, one of the best ways to stop mildew from forming on your windows is to lower the humidity in your home's mildew-prone areas. This can be done with a standard electric fan. Portable air conditioners and window AC units can also prove quite useful in lowering humidity. Additionally, if your home has central air, consider extending its use into your home's humid areas (basements and attics) if you haven't already done so.
Step 3 - Proper Ventilation
Another simple yet highly effective preventive measure is to make sure mildew-prone areas are properly ventilated. If your basement or attic are prime spots for mildew formation, open the windows and air them out once a week. If your bathroom windows frequently fall victim to mildew infestation, install a window fan and set it on "exhaust" whenever your shower is in use. This will help get rid of the moisture-heavy steam produced by hot showers. If you don't have access to a window fan, leave your bathroom door partially open whenever your shower is in use, thus allowing the steam to make a prompt exit from your bathroom.