Originally Posted by
RiverHills
That's obviously a more extreme case than riding two or three times between washings. Not to mention, using all that electricity and water to wash a pair of shorts after every ride flies in the face of riding a bike to be more eco-conscious.
Deep Sky's right. Just handwash them. No electricity used, and the amount of water to soak 'em in a sink and then rinse them out isn't all that much. You can be eco-conscious without being a filthy hippie.

At the very least you should bring them into the shower and rinse 'em out, especially if you're using a chamois creme.