There was an interesting thread over on e-budo:
I thought I'd tackle the same question over here. The question is do you wash your belt and why or why not?
For the record, I've been told to never wash my belt for 3 reasons:
1. Ye olde white to brown to black to white story.
2. It's tradition (not exactly the same as #1).
3. Washing removes your ki from the belt.
That last one is kind of true in a warped sort of way. Interestingly, it must have taken because I've never washed one of mine. Honestly, I kind of like a ratty belt that looks like it's been through a war or two.
So do you wash your belt?