We found a formula for a glass cleaner in Consumers Report years ago & haven't used anything else since. In a gallon container mix 1/2 cup clear ammonia, 1 pint alcohol & 1tsp New Dawn ( use only New Dawn) dish washing liquid. Fill the container with water. We apply it with a spray bottle & wipe it off with a paper towel. My wife also uses it on kitchen appliances etc.. Works great & no streaks. Les [Non-text portions of this message have been removed]