plain water is the best .... on an almost dry cloth.
most creaners contain solvents ... and the top coating of an lcd is very mechanically tough .... but vulnerable to chemicals
now you've "gunked" the screen with polish you'll need a slightly dampened cloth and a little natural soap
then wipe with a damp cloth
2 or 3 wipe-overs should do it
(or try baby wipes - fragrance free)
even better nip down to pc world and buy a tub of screen wipes
(cheap when you think of howmuch you've spent)