How to clean fur lined crocs the best

My fur lined crocs were sooo comfy and cosy when I got them, it’s been like two months and they’re so flat and have collected smells from walking round a farm and it’s just all bad 😭😭

I’ve put them in the wash and they smelled better but it kinda comes back, they also must be like a breeding ground for bacteria 💔

What should I try, to get them back to their original state as much as possible and any hacks to keep them as good?

Just feels like I’ve wasted my money a bit since they were only so comfy for a bout a week or two