[header] How to get water stains off wood [title] Put mineral oil on a soft rag and rub it into the stain. [step] Let it sit overnight and repeat if the stain seems to have diminished. [title] Rub the stain with mineral spirits on a soft cloth if the mineral oil doesn't work. 
[step] Mineral spirits is a mild solvent that can remove a stain that has penetrated into the wax, but not the finish. [substeps] Wear gloves and apply it in a well-ventilated area.