This may seem a strange question, but here goes. We have a real oak floor in the bathroom, waxed regularly. Sadly my ill Father in Law has been staying recently and we have just noticed a nasty black stain on the wood has developed under the bath mat!
Clearly a reaction of urine and the wood/wax polish. I have tried washing it off with no success.
Any suggestions of how to clean this off. The last resort will be to sand it but I would prefer not to if possible.
Thanks in advance. John