Bamboo Mat Board

My dog has been peeing in the vicinity of the exercise machine for a couple MOS. and I did not think to look under the rubber mat, I did not even know it was there pee as I almost never use the room. I lifted the carpet today and found 2 mos. worth of pee trapped under the mat, not only was disgusting, but the bamboo floor boards are blackened under the mat ... there is nothing I can do, or is it hopeless? I think they should be replaced, but will be expensive and yet I can not afford it. Ugh! HELP!

Get a firm demolition tool. It's just a flat piece of metal with a polished edge. Discover the technique for demolition. To do this, to see the depth of the stain is in. If you go out in about 1/8th inch, then do it. If it is deeper, you'll have a spot. Their are other options to help them become cosmetically less visible spots. Ask if you want the information.