I carry wipes and gloves. Wipes are WetOnes antibacterial in the single pouches. I also carry a small bottle of GoJo hand cleaner. The Container Store sells small travel bottles not much bigger than a film canister. GoJo cleans the gnarliest grease and can also get grease off clothes.
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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,Brompton S6L/S2E-X/M6L-X/S12 T Line