Scope lens cleaning

[fgw_in_fla]

What's a good way to clean scope lenses? Is there anything out there that I can use that's specifically for lens cleaning that won't leave streaks & won't affect coatings?

My wife works for an eye surgeon & deals with optics daily. She says for a quick clean, a lint free cloth with a few drops of alcohol. A friend of mine says ammonia with clean, filtered water. My father spits on his binoculars or camera lens & wipes it with his shirt tail.

As you see, I've had exposure to various methods of lens cleaning. I hate dirty glass in my scopes. It's hard enough to see as you get older without dealing with streaky glass.

Anyone have anything useful on this?

Thanks,
Frank in Fla