I have used a few techniques found online, but I just found this site which may be helpful for rodent urine
They seem to specialize in urine stains and have solutions to all urine stains by the look of it. There is a link to it below.
You might try Cascade Powder dissolved in water. Soak as long as needed. I just put an amount in according to stain. Be sure to dissolve. Have used on whited and colors.
I just got my summer clothes out and my favorite white shorts have a big yellow stain on the pocket. Well, I'm most certain it is (mouse urine), I've washed them in Clorox, sprayed them with Resolve, and let them sit. This I have done more than once. The stain is still there. Should I give up? Or is there something else I can try?
I would put them in a bucket or basin with hot water and a cup of Oxy Clean and leave it for a week or more. This saved a bedspread of mine with similar stains that wouldn't come out.
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