Ive heard it is bad to use alcohol on the oleophobic coating on the screen.
Might want to look into that before trying it.
I've used a tiny dab of diluted dish soap ...reeeally tiny....and warm water on a soft lint free cloth, just damp enough to clean but not drip all over the phone of course. And then wipe with a dry tea towel or other soft cloth, that gets the streaks off nicely.