Just back from hols, collected dcat from cattery and she pees in cat carrier on way home (pretty standard) has an old towel in bottom. I fold up the towel so pee is on inside (not a lot just damp) and buzz it on floor in front of washer, two days later pick it up to find black stain on floor. Any suggestions I've so far tried soap, wood cleaner and a little bit of Milton fluid - do I risk going full bleach on it? Floor is 1 Year old gahhhhh!