Be careful with any kind of wiping. Never use physical wiping as the first way of removing dirt. That should be a gentle blowing or a soft lens brush. Only then wipe. The reason for this is that if any hard particles are on the lens when wiping, they can scratch as they are being ground into the lens. Wiping is for removing soft things stuck to the lens, like a fingerprint, the remnants of a dried water drop, etc.

I don't know if alchohol is OK. Certainly it's fine for bare glass, but the front of camera lenses aren't glass but some kind of coating. Those may not like alchohol. The best answer would be in the directions that came with whatever lens you want to clean.

I like to use distilled water when wiping a lens, which should be safe with any lens. Fortunately distilled water is usually handy and available. Exhale gently on the lens to fog it. That will deposit essentially distilled water. By exhaling gently I mean a sort of soft huffing with your mouth open the whole time close over the lens, with no sudden burst of air that could cause spit to come along. This doesn't work in the desert when the lens is warmer than your breath, but most of the time it is effective enough.