water stain on seat

[JLSSLJ]

Ok, I admit this is slightly neurotic, considering I've got a Jeep Wrangler and use it for work (remodelling/construction).

I had a wet vac spill a small amount of dirty water on the front seat (cloth). I've tried countless stain removal products and upholstery cleaners. What's different, is that the stain is pretty much white/irridecent colored. I really have no idea what was in the water when it spilled, so I'm shooting in the dark here.
Anybody have any ideas or suggestions?? (Could send a pic if necc.)