To dry windows without any streaks to them, use newspapers. Window cleaning professionals everywhere know and use this trick. Simply clean your windows as you normally would then run a piece of newspaper over the windows. It will create a streak free shine you will love.
To keep your windows looking great, always start the process with a clean applicator and clean window scrubber. If you start with something dirty, your window cleaning will be that much harder. Also, consider changing out that window brush any time that it begins to get too dirty.