I always use a microfiber cloth and I wipe in one direction only, don't put any liquid on the lenses dry works best. I have to have AR on my lenses because I can't stand the reflections of light.-Sorry if this is too Off Topic, but in regards to AR coating.... NEVER get AR coating on your lenses, if you wear eyeglasses!!!
Oh my lord, what a mistake that has been for me. I never used to have issues with grease/fingerprints/smudges on my eyeglasses, but the last pair I bought, I went for the 'anti-glare' which is pretty much similar to AR on watches, I suppose. Well, long story short, I will never do it again, whatever they use, it's impossible to clean quickly/easily. Any smudge requires a full wash in the sink. What a pain. o|
Sorry for the thread crapping.