Water line rings can be challenging to scrub clean in your favorite flower vases, so here is one possible solution. Savvy Green Oxygen Brightening Powder will dissolve those mineral deposits. You can let your vases soak for a hour or so — or overnight, and notice how easy it is to get rid of the ring. In this video vases, dishes, and even a rain gauge were used to test out this tip. Without the use of scrub brushes — with only a sponge, the water rings were gone. If your water ring stain is particularly stubborn you may want to add a small amount of vinegar to loosen the mineral deposits. Thanks so much Marilyn for the great tip!