Hey guys im new but doing well with the windows, here goes.
Screens get a plastic clip like the ones in the check out line at home deopt tie a string to it and hang screen off of top of ladder while washing. and as for the streaks squeegeeing, while pulling down angle the blade towards the dry pass and overlap by an inch or two. if you pull with a decent speed the watter flows up the blade and away from the dry area.
Master this move and you doen't have to wipe your blade, just watch your drips when going for the next pull.
Good luck to all.
Mac.