How Do I Get White Marks Left From Sweaty Glasses Off My Dining Room Table?
A simple method is to take a piece of waxed paper and lay it over the water stain (waxed side down on the water stain). Take a towel and lay it on top of that. Plug in your iron and have it on a low to medium setting and iron on the towel. This method puts the wax back on the table. See below for reason you want to do that. The white stain from a water glass on a wooden table is actually from the wax that has been removed from the wood surface. Using this waxed paper method usually takes out the water stain, unless the water glass sat on the wooden surface for a really long time. In the later case, you may have to sand that area and restain that area and apply varnish if there is varnish on the table. The other alternative which is more time consuming is to strip the table top or table, sand etc, restain, and revarnish etc. If it is a very expensive table, you could consult an antique restoration expert. That will cost more, however.
