My mountain biking shoes (which I also now use for road cycling) have become an environmental hazard. They stink up any area they're in for more than about 10 seconds. I believe it's from the many times they get soaked in stream crossings (just about every ride). They are non-leather (Sidi) so shrinking is not really a problem. They still fit fine. They just stink. What can I do about this? Given that they have survived multiple soakings and dryings already, can I wash them? Or is it time for a new pair?

Put them in the freezer. Works everytime. If the thought makes you squeamish, put them in a ziplock bag first. Makes sense because the cause of the smells like warm humid places, to put them in a dry cold freezer would obviously be their demise!

Wear them into the pool (when no one is looking), then let them set in the sun. The chlorine and UV will dent the smell for a while.

... and yank the inserts out whenever you dry 'em. Mine seem to smell fishy when they get wet.

I have one of those shoe/boot dryers they sell in those outdoor stores and they work great! Every household should have one, it makes getting your shoes wet a non-issue. It uses very low heat, no fan. It won't heat up your shoes too much and it doesn't matter how long you leave them on it. It does dry them out though. Great for hiking boots, shoes, even gloves.

The Dr. Scholls spray works really well. Every couple rides I spray the inside with a shot of some cheap woman's spray on deoderant I got at the store. It keeps the feet a bit drier and spring fresh