Try wetting it and then putting it in the freezer for about 3 or 4 hours.
If that doesn't work, try pouring milk on it and rubbing with a paper towel.
If that doesn't work, and you have a Dollar Tree near you, go there and buy a spray bottle of AWESOME (that's the name of the product). The bottle says to dilute it, try that first. If it's still not out, spritz the AWESOME straight on it and wash.