Teak is a tall tree that is native to regions of South East Asia, India, Thailand and Laos. It was originally used in the production of boats, and still is today. Teak is now a popular material in the manufacturing of both indoor and outdoor furniture. Water stains that form on outdoor teak furniture will eventually dry and fade in the sun. This will not occur on interior furniture. It is possible to remove water stains from teak pieces without the need for harmful chemicals.
Combine two cups water and one tbsp liquid dish soap in a bucket.
Soak a soft cloth in the bucket. Wring out the cloth until the majority of the liquid is removed and the cloth is damp, not soaking wet.
Rub the water stained areas with the soft cloth.
Remove stubborn stains by rubbing at the stain with a soft bristled brush that has been soaked in the soapy water mixture. Avoid using abrasive cleaning instruments as these can damage the teak.
Allow the piece to dry for 24 hours.
Sand the teak wood with 320 grit-sandpaper. Sand the teak wood lightly in the direction of the wood's grain. This will help reveal the natural wood colour underneath any dirt and it will prepare the wood for teak oil. Wipe away any dust created by the sanding process with a soft cloth.
Apply a thin layer of teak oil to the wood with a paintbrush. This will help protect the wood from any further damage or staining. Allow the wood to dry before applying two more thin layers of the teak oil.
Water stains can be removed from outdoor teak furniture with this method as well if you do not wish to wait for the stain to fade naturally.