Where would one find upholstery shampoo?

My puppy peed on my new mattress and I tried cleaning it but now it's left a stain from the soap I used =(. I want it gone asap. I was think wal-mart or such? Unless anyone knows a specific place I could buy really good stuff?Where would one find upholstery shampoo?
Another option is to call the place where you got your mattress and see what they recommend. Plus, you could also check with a local pet store about products they might have to help with this situation.


Hope this helps. Take care.Where would one find upholstery shampoo?
The cleaning aisle of any grocery, discount or hardware store. Pet stores and auto parts stores sell upholstery shampoo as well.