Look for a hunk of cloth on the side of the road, just make sure its not a diaper, or underwear, or...well you know. I always find something if I'm looking, use it to wipe the chain down good and reapply the chain lube of your choice, I use Pedros, then dispose of properly. You help clean up litter and you got your chain maintenance chore done, +2 Karma points for you. I try and do this every other day , at minimum.