At work yesterday, a dog who had a bloody nose shook his head and got blood all over my pants. We use hydrogen peroxide to clean blood out of fur, so I tried it on my pants. It seemed to work for the blood that was still wet, but the dried blood didn’t come out. I washed my pants in the washing machine twice in cold water last night. The stains were still there. It looks like I’ll have to turn to some form of store-bought stain remover.