I have not. I just keep mine in a tote with my other gear and make sure to spray them down well before I put them on at the truck.
That is what I do too. Honestly I have never even thought of washing them. Guess you could if you want.
Once a year or so ill soak my climbing harrness and backpack in a solution of scent free soap and let hang out to dry. I also keep them in a scent lock bag with some wafers.
I just keep them in the same container as my outer layer clothes and spray down before and sometimes after putting it on.
My harness gets the occasional wash, all the ropes & gear gets sprayed down with scent killing spray a number of times throughout the season.