Get some nylon sockettes and some cedar shavings (the stuff they use for hamster bedding) from your local pet store. Stuff the sockettes with some cedar shavings, and simply insert into the VFFs when not in use. Just shake the VFFs out before wearing to remove any cedar particles.

I've been doing this for my KSO Treks and Sprints for several weeks now, and I don't have to wash them anywhere near as much now. It's the best odour management trick I've tried yet. In fact, odour elimination trick might be more accurate.

I expect that I'll have to change the shavings periodically, but so far the first lot is holding up well.

I got the idea from birthdayshoes.com, who did a post a few months back on some fancy inserts they bought at the local running store, with nylon straps for hanging the shoes they're inserted in on hooks or doorknobs. I figured that a) I can stuff things full of cedar shavings myself, and b) hooks and doorknobs are Neolithic...

Not for nothing but I avoid this issue with my KSOs by wearing Injinji socks.

I have the following:

• Flow
• KSO
• 2x KSO Trek

I can't get the stink out of my Flow and KSO. I've washed both several times in a washing machine, and soaked and scrubbed them in a water-vinegar bath three times. When they dry, the smell is tolerable, but definitely there. After wearing them twice, the smell is easily noticable by others.

My KSO Treks only become stinky when they become soggy. When that happens, I wash'em out in the bath tub with warm water, and let them dry. They're good for another wear or two, and then they become smelly. However, I can throw them in a washing machine, and they come out stink-free.

I love my KSO Treks.

I use baking soda mixed with enough hydrogen peroxide to make a water paste. Add a few drops of dishing washing liquid for the surfectant effect and rub around and rinse the shoes. No more stink. THis is the same recipe for getting skunk off dog so you can bet it works even on stinky shoes! I think it also helps a lot of you don't wear your vibrams every day. I have the classic vibrams.

By far the best product to kill odour is some brilliant stuff called "Grans foot remedy " source some and buy it, it really works. It's a phenomenonal product.

I have a set of the brown leather KSO treks and a standard set of KSOs. My wife has a pair of solid black KSOs. We've had minimal issues with smell - and nothing that couldn't be solved by throwing them in the wash.

I've heard but not tested the kangaroo leather treks avoid the ammonia funk.

My standard KSOs clean easily with a little baking soda or vinegar

I'd love to hear about smartwool too

The smell seems to come from bacterial growth, which is usually worse with synthetics

A friend of mine recommended using denture tablets. We start the washing machine with the lid open, add the KSOs and a few denture tablets, soak for an hour, and then put the lid down to run the machine as normal. The tablets use enzymes to kill bacteria, so they are gentle on the fabric of the shoes.

Though decidedly not paleo, I have had great results spraying my Vibrams with Dr. Scholl's Odor Destroyers Foot & Sneaker Spray Powder after each use. They remain odor-free indefinitely, although it's still a good idea to wash them periodically (to remove the powder, if nothing else).

The absolute best thing to eliminate odors in 5 fingers is mirazyme http://www.mcnett.com/MiraZyme-Enzyme-Based-Odor-Eliminator-P170.aspx I wear KSO's sea kayaking during the summer, literally 5 days a week, 12 hours a day of in and out of water, muck and sand. They smell absolutely awful at the end of the week. My boyfriend's (who worked the same job) were so bad they had to live outside. I dipped his in mirazyme (the sink filled with water and 2 drops of the solution) and could literally stick my nose in them and inhale without passing out. I swear its amazing. I usually run mine through the wash, then dip them in the mirazyme solution and let them air dry.