I don't make it a habit to do auto UPH.....but the wife highlander always looks like a homeless camp and every time I turn around it has something going on in it......when I clean hers I just treat it like I am doing a couch or a love seat....my daughter is always spilling water or juices but it always cleans up real good...auto uph is normally some pretty tough stuff...
I'd get it clean first, then speed dry it. You really won't know the outcome until after. I'm betting a good cleaning will remove the water stains (which is mostly likely just residue).