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Pour and spread on a thick coat of baking soda.Next, pour about 1 tablespoon of peroxide in each ring. You want enough to wet the baking soda but not drench it.Let sit for 15 minutes. After 15 minutes, begin scrubbing away the grime.For tough areas, use a knife to loosen the grime.Spray with your All-Purpose cleaner and wipe clean and dry.
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