The Weakly: how do you deal with post-run butt sweat

I'm here asking the important questions while watching as much Olympic sport as possible.

Big Q: how do you deal with butt sweat on your car seats?

As often as possible, I try to run in different parts of the city, with different people. Living in a public transit blackspot, I have to drive. That post-run glow, however, is quite damp, and car seat upholstery isn’t as easy to throw into the washing machine as a pair of shorts.