dilemma

I had a brief and slightly uncomfortable dilemma this morning. I was driving to work and was only about 100 feet from the lot where I normally park (when I don't ride my bike) and I saw some kind of dollar bill in the street. Hey! Free money! So I parked and walked back to get the money, half hoping that it was a $50, half hoping that it actually was money, half hoping that no one else got there first (yes I know, bad math). I got there first, and saw that it was actually money and that it was a dollar bill. Yippee! Then I picked it up and realized why it stayed so perfectly in the center of the street despite cars driving past and a light breeze. Urgh, gum. Not a little tiny bit of gum on the corner, but a melty, sticky, entire-roll-of-bubbletape piece of gum. Shit! Now, not only did I run down the street flapping like a goose to get to the money before anyone else, but I'm carrying an icky-sticky dollar that I don't know what to do with. Here is the dilemma: keep the dollar (which is totally irredeemable so I'd have to take it to the bank and exchange it, but in order to do that I'd have to find something to transport it in) or drop it for someone else to find/deal with (it was, after all, only a dollar)?

So, what would you do?