I would love to walk down to the corner store and pick up a lens cleaning kit, but for those of you who have been here, you know that isn't really possible... is there any way to do an okay clean job with a t-shirt? What if it is damp? Please advise - i'm about ready to go out exploring for the day, and I'd like my lens as good and fixed up as i can get it before i leave! Also, if it fogs up during the day, which it likely will, what is the best quick remedy? THANKS!