cigamI never wear socks with mine anymore, and I just throw them in with the rest of the laundry as needed. If I happen to be doing a load with Sport Wash (or the like), all the better. As long as I stay ahead of it, I don't have the odor issues I've read others complain about over the years.
cigamI've owned Vibrams for around 6 years... I've rarely washed them... maybe once a year... and I dont wear socks with them.
If they need a wash... just throw them in the machine and let air dry.