Hi again, and you're most welcome!
Thanks for your reply with additional information.
I understand re: the SpotBot and the long fibers, but I know that machine does a great job on other surfaces!
Yes, it is
unfortunate that your kitty marked it with urine.
My best suggestion would be to try an enzyme-based product for pet stains/odor removal (not in the tub) like Nature's Miracle, Urine Off or Zero Odor (follow directions on the product). They really do remove the smell/stain effectively on materials that can be treated with water. I'd first try it on an inconspicuous area, perhaps on the underside, to see if it causes any lightening or change in color; if it's successful, then try it on the place he marked. Don't use too much or let it sit too long and then absorb with paper towel to get both the urine and enzyme product off the mat. Place a few layers of paper towel under the mat when you do this, too, to absorb any liquid that goes through.
Here is information about the products mentioned (they are available in major pet supply stores and sometimes in other stores like Target, Walmart, etc. and also can be ordered online):http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=769http://urineoff.com/http://www.zeroodorpet.com/
You'll also find this helpful:http://www.apartmenttherapy.com/how-to-clean-a-coir-doormat-th-135047
I also wanted to mention that after cleaning the mat and it is completely dry, spraying Feliway, a cat appeasing pheromone on the mat should make your cat think he's already marked there, and hopefully he will not return to that spot. Don't allow him to contact it until the Feliway is completely dry--typically about 30 minutes. You can also find this product in pet supply stores or order online. If you need more info, just let me know.
I hope you are successful in removing that stain/odor from your coir mat.
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