Regular window cleaner is the most common product to use to clean windows. This requires you to do a lot of manual labor to get all the windows in your home clean. If you want spotless windows on your home, then another option is needed. Less work will be a great benefit too.
The key to having spotless windows is to prevent water drops on the glass. There is a product that you can apply on your windows that will keep this from happening. One application is all you need to have