I've washed mine. But towards the end of their lives, when they smelt like they were cultivating life of their own. Think even used bio. Stuck on a rad it felt stiffer for a short while as well.
Wrap toilet paper around the outside and stick glove cuff down on a rad and the moisture is drawn out to the paper rather than stuck inside.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep