My lenses don't get that dirty!

I use a small blower and a soft lens brush to get most stuff off them. If they've got splash marks on them, then I use lens tissue and a drop or two of cleaning fluid ("lens cleaning fluid", or "eclipse", or something similar). Oh, and much of the time a small microfibre cloth is all it takes.

But that's all very old school of me -- quite literally, it's how I learned to do it over 30 years ago in high-school.

I too wonder how the modern crowd deal with this? Cris?