Any kind of dust repellant?

I have a S3 IS and it alwasy seems to have dust on it, along with my nikon coolpix L1 which ALWAYS has dust, and I can't get anything in there to clean it well.

I shoot outside, all day, so I was wondering if there is something out there that you can put on the glass to repel the dust and dirt.

You mean that the lens has dust on ot ?
I'd say that if the dust doesn't show in the pictures (my bet is that it doesn't) - then don't worry about it. Just be sure to clean it occasionally

problem with the nikon is that it does show up, when I'm taking pictures in harsh light, which is probably 1/4 of the pictures I have to take. I try holding my hand over the lens a little to act as a lens hood, but then it's harder to hold the camera steady