Carry non-latex gloves. I do for messy things or if I were to come across someone who's hurt. Also,you can use a stick,leaves,or a piece of paper to manipulate the chain;there's almost always going to be something in your immediate vicinity that you can use.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X