Window Cleaning: Regular window cleaners contain ammonia. They get the job done, but this chemical is very strong and can be dangerous to the environment, as well as humans and pets. To clean windows more naturally, a half gallon of water and four tablespoons of lemon juice mixed well together can get the job done. To skip using paper towels, try an old cotton T-shirt or another type of lint-free, natural fabric. This method can also be used on the mirrors in your home.