Also handy to have is a pack of PecPads, some Eclipse fluid and a small spatula, all sold in a kit form to help with sensor cleaning. The kit is called Copperhill, and is sold from various places, one good source is Quality Camera(where I got mine a long time ago.. and still in use
So, once you have this kit to help you clean up your sensor on the odd occasion, you also have the best
lens/filter cleaning kit I think available.
Sometimes grubby fingers and noses and lips may occasionally touch your glass elements(bloody annoying kids!!), and you need a bit more than water, breath and a microfibre cloth to get them clean again(with minimum effort that is). I use them sparingly on my filters or
lenses, I doubt that Eclipse fluid will damage any
lens glass, as is often stupidly reported.. I mena if it's supposedly safe for use on a sensor, how on earth is t not safe for use on a
lens!
anyhow, these are only a few of the things I've used. I no longer use any '
lens tissue' as I find they are too rough.. when compared to PecPads and microfibre cloths that is.
Note, while using Eclipse fluid on a
lens or filter sounds a bit extreme, I've found on a few occasions that my CPL fillters have had this
light smearing of a greasy film on them, which is only seen in specific
light conditions and when the filter is angled to a very narrow angle relative to the
light source. These few CPL's that I have that (used) to do this were the cheaper Hoya brand CPLs, and I subsequently found out that they have a
light smearing of a greasy compound around the rotating bezel(that turns the polarising glass). Why a filter needs grease is completely beyond my ability to reason.. it;s not like they spin at 3000 RPM, is it?... and I only found this out because in trying to clean this smearing off the glass one day, the filter came apart(the bezel came off the filter body and I got black greasy crap on my shirt and fingers. The only (safe) way to get this greasiness off the polarising glass was with Eclipse fluid, as every other 'normally approved' method only smeared the filter more.
These are just a few alternate observations I've made over the years..... but basically as Andrew said for 99.999% of your
lens cleaning needs.