Last year I changed the oil in my bike and drained it into a open container. The whole top of the container was cut off. Before I could get around to moving it to a safer place my dog came by and stepped on the side of the container full of waste oil.
The oil went all over my bike and covered the front tire. I thought it was done.:banghead: I reached for some Purple Power and scrubbed like crazy. I got another full day out of that tire.
Like Derek said, clean it with some degreaser and roll it.