Having had my 3 pairs of VFF’s a few months now, I have come to one conclusion. Machine washing alone does NOT get all of the stink out, especially when it come to my Bikilas.
Following my own advice I hopped up on birthdayshoes.com, my Bible for everything VFF. I tried first one of the suggestions of leaving oxyclean soaking on the shoes for 30 minutes before putting in them in the washer. This worked for a while, at lease with my treksports and sprints, but my Bikilas were still getting really ripe.
I decided to be brave and try one of the most ridiculous sounding suggestions on the site, soaking my VFFs in efferdent, a denture cleaner. I got a big old cat little tub and filled it up most of the way with warm water. I put a tablet inside each shoe and let it soak for about 30 minutes. After soaking (yes they smelled minty fresh by the way) I popped them in the washing machine. To my surprise, when they came out they were stank free!!!!
I highly recommend this method to anyone who has had some ripe smelling Vibrams!