Dude. Wash them in the sink!
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Back when I ran a branch of a security company, I occasionally got caught further than I'd have liked from home, and had to get a hotel for the night. The first couple times it happened I hadn't packed an overnight bag and left it in the truck. So I had to wash my clothes in the bathtub, then hang them overnight to dry.
It works.
Sucks, but it works.