Wear rubber gloves for this tip. In a disposable pan put strips of toilet tissue folded in half, pour enough Lime Away on them to soak thoroughly. Stick tissue paper to lime scale buildup or mineral deposits under rim. Allow to soak as long as necessary to loosen buildup. May take several applications to thoroughly remove. If stains are below water, shut off water supply then flush. Use a plunger to remove all the water possible or dip out. Pour Lima A Way into any remaining water, enough to be a strong solution. Use toilet tissue soaked in Lime A Way to areas out of water. Allow to soak as necessary. Remove a piece of tissue . Use Toilet brush designed to get under the rim. Use Firm toothbrush to remove any that you cant reach. Pumice stone can also be used on stubborn stains !