Do Dishwashing Tablets remove tea stains?Updated 7 days ago

Two steps. First lift the stain: apply Koh Universal Cleaner directly to the stained area inside the mug, wipe or gently scrub with a sponge or microfibre cloth, then rinse thoroughly with water. Second, wash as normal: put the mug in the dishwasher with a Koh Dishwashing Tab and run a normal cycle. Universal Cleaner does the work on the tannins and the wash cycle takes care of everything else. Older, darker rings may need a second pass with Universal Cleaner before they lift completely.

Tea and coffee tannins bond tightly to ceramic and porcelain, more tightly than the food residue a dishwasher cycle is built around. Koh Dishwashing Tabs lift food and grease in the wash, which is what most dishwashing actually needs. A bonded tannin ring responds better to a cleaner applied straight onto the stain with a wipe or a scrub, and that is where Koh Universal Cleaner earns its place. Lift the stain by hand first, then let the wash cycle do the rest.

The same two steps work on teapots, travel mugs, thermos flasks and stainless steel keep cups. Apply Koh Universal Cleaner to the stained surface, wipe or scrub, then rinse thoroughly. Vacuum-insulated flasks and anything with a sealed lid mechanism are usually not dishwasher rated, so check the manufacturer's guidance and finish those by hand rather than putting them through a cycle. Stained plastic lids and silicone seals hold tannins too, so give them the same wipe.