When I wore glasses permanently, I would breethe on them and use my shirt tails. Worked very effectively and I guess I did several times an hour becaise I couldn’t stand them dirty (being short-sighted I could see any marks on them). In those days the lenses were made of glass, with no coatings, so no risk of scratching or removing coating. At the age of about 14 I had decided I hated glasses so much that I stopped wearing them, and went through the rest of my school years having to sit at the front to see the blackboard (called that because it was black, not called a chalkboard because it wasn’t made of chalk). For other things like going to the cinema I had to pull the corners of my eyes to bring the screen into some semblence of focus: but better than wearing hateful glasses. Then I discovered contact lenses, and have been wearing them ever since.
Cleaning is a rub with a few drops of Bausch & Lomb Boston contact lens cleaner and put it in the same brand soaking solution overnight – otherwise normal tears and blinking keep them clean! And they never mist up when coming in from the cold! Unfortunately in the recent past I have had to start using reading glasses for either very small print or reading in dim light, especially when my eyes are tired. I still hate the things, but at least now with plastic lenses they are lighter in weight, and I only have to wear for short periods. To clean them I breathe on them and use a microfibre cloth. Occasionally if they are greasy I wash them with soap and water and rinse under the tap, dabbing dry with a tissue or absorbent kitchen paper, and if necessary polish with a microfibre cloth.With camera lenses I try to avoid ever touching the glass, so most of the time only a blower brush is needed to remove specks of dust. In the unfortunate event of a fingerprint I use the breath and microfibre cloth approach - I am wary of cleaning liquids, and indeed wary of rubbing the lens with anything unless absolutely essential because the coatings can be damaged.