mwsilvers wrote:
LensPens are quite popular and are an effective tool for removing dust, fingerprints, water spots, oils and the dust and dirt that adheres to it. Its not good for removing larger amounts of dirt and mud, grease, baby spittle, peanut butter and jelly, etc. I carry one all the time. Thankfully, the main issue I have is fingerprints and airborne oily dust for which its a perfect solution.
I would classify the presence of "splashed" dirt, mud, grease, baby spittle, and PB&J as "potentially hazardous photographic situations" requiring the attachment of a clear glass protector (or circular polarizer or neutral density filter if appropriate) over the front of my lens. That way, I can clean a (relatively) cheap piece of glass instead of risk ruining the coatings of my lens. (Peanut butter and jelly is one of the most difficult and disgusting messes to clean off optical glass, especially if it dries in the sun!)
Otherwise, I generally like to use lens cleaning fluid and tissue specifically made for photographic lens cleaning. I blow the surface dust away with a Rocket Blower, then wet a wad of lens tissue with fluid and wipe gently in a spiral from the center of the lens to the outer edges. Then I repeat with clean tissue and more fluid. Then I dry with a third tissue.