did the fellowship have changes of clothes? if not they kept them very clean considering?

The Fellowship was dirty and stinky the entire journey. That's why they weren't initially well-received wherever they went. 🤣

I remember commenting that the elves seemed to always appear less dirty than the rest of the cast, Legolas in particular. There was a furniture protection commercial at the time that I started applying the tagline to elves - specially treated so that dirt and grime don't adhere!

They might have some had spare clothes, though I don't think we see any in the films. The Fellowship had to travel light; their only baggage animal was Bill the Pony.

The the movies, I think Frodo packed a white shirt, but that's all we see. They do have different clothes every once in a while.

I'm sure they got new clothes in Lorien, even if only the cloaks were mentioned.

I want to say that their elvish garments had antibacterial properties that kept them relatively clean, but everything else was probably approaching the point where lethal amounts of microbes were growing.