I've a selection of bamboo nappies and they have all gone stinky in the past week or two. I've not changed my washing method and I don't think DS has changed his diet radically so why has this happened and how can I de-stink them? It's only when they are wet BTW. When they are dry they are fine, no problem, but when he pees in them it's really quite pungent. Your help would be appreciated.