If you have a stain on wood, it will look white. If you tried using water, you'll notice that it disappears, for a few minutes or even seconds. It will keep coming back.
Do not use any cleaner or rubbing alcohol; it can stain it worse or damage permanently. To remove the stain, you will need 2 small/large cloths, depending on how big of stain and some mayonnaise.
- Squirt mayonnaise onto surface and rub in around the area.
- Use 2nd cloth to rub off mayonnaise.
The surface should be smooth and may be a little sticky from the stain. Repeat all steps again, or repeat using Cooking Oil or Baby Oil (Many oils are usable, but these are most effective). If nothing works, you could either sand down and refinish or buy a floss or any wood stain remover products.