When working at your desk, it is not uncommon to keep a cold drink within arm's reach. Unfortunately, a sweaty glass left to sit on your leather-top desk can leave an unsightly ring. Condensation causes a sweaty glass. When the air is hotter than the contents of the glass, condensation or moisture will begin to form. The moisture beads up and rolls down the glass landing on the area around the cup. If you do not remove the moisture quickly, it will leave a water ring.
Wipe the leather top desk with a dry cloth to remove surface dust, dirt and other debris.
Dampen a clean cloth with water. Blot the glass rings with the cloth. Dampen the leather with the water. Allow the desk to air-dry. If the water rings are still visible, continue with the remaining steps.
Saturate a sponge in white vinegar. Wring out the excess vinegar so the sponge is damp but not dripping wet.
Rub the glass rings with the sponge. Saturate it in the vinegar and wring out the excess liquid when it becomes dry.
Continue rubbing the desk until the glass water rings are no longer visible. Wipe the desk with a damp cloth and dry with a towel.
Rub mayonnaise onto the water rings for several seconds. Allow the mayonnaise to sit on the leather-top desk for two hours. After the allotted time has passed, wipe the mayonnaise off with a damp cloth.