Is it OK to wash luggage?

I'm curious, could you please elaborate on the practice of washing luggage? It's not something I've heard of before, so I'm wondering if it's actually advisable to do so. Is there a specific reason why someone might want to wash their luggage, and if so, what's the best way to go about it? Are there any potential drawbacks or risks associated with washing luggage that I should be aware of? I'd appreciate any insights you can provide on this topic.