How do you clean windows streak free?
I've always used a bowl of hot water with washing up liquid, wash on with a cloth and wipe off with a squeegee.
Choose a cool cloudy day to clean your windows with vinegar and water and crumpled up newspaper. Also go in one direction on the inside and the opposite direction on the outside. That way it's easy to know which side of the glass has a streak which it shouldn't.
Rubbing alcohol and coffee filters. It evaporates and dries streak free.