Green Clean Your Windows Don’t bother with Windex! Instead, use this eco-friendly, frugal cleaner. Mix together: 1 cup of water 1/2 cup vinegar 1/4 cup alcohol in a spray bottle and gently shake. This is an awesome window cleaner that really does a good job getting off grimy winter dirt. It’s also important when green cleaning your car to use reusable cloth wipes instead of paper towels. I use microfiber towels when doing my own windows and they work great.