Canon SLRs Lenses

How to clean digital camera lens?
I could google it up, but I’d like to know how do YOU do it, what do you use …
Most helpful answer will be selected, promise.

i hate using the cloths because i end up scratching the lens. not good, but should i take it somewhere? or can i buy like wet cloths?
thanks!!!!

I have a Sony Ericsson s710a (or something with a s/710/a!)

I have a cannon rebel that I got from ebay and the lens is dirty, I orderd a cleaning kit, but it looks like a pen, one side is a brush and I have no idea what the other side does it looks like flat rubber but when i ran across a piece of paper it left a black trail? how do i use this thing or what can I use around the house to get these smudges off?

I have what seems like a little spot on my lens and i don’t have a cleaning kit with me, i am in a hotel, so what can i use to clean it?

will it make any difference if you leave the camera with the fingermarks on the lens? does this mean your pictures cannot come out with great quality, as compared to when you clean it?

I have what looks like water spots on my pics when I take them. I need something around the house that I can use with out scratching the lens when I wipe it down….Any suggestions

I have this phone:http://i193.photobucket.com/albums/z205/…
And I forgot to close the camera thing on the back, so now there’s ickiness on it and I don’t know to clean it. Any suggestions?

My friend is always messing with my canon powershot without asking. Tonight she just left and now I noticed the lens has a huge smuge all over it, and all the pictures I take are now turning out blurry.
How can I clean off the lens without scratching it?

I just bought a new Canon “L” lens (the 24-70mm) and was wondering: what is the best way to clean it?