I banished stubborn tea stains from my favourite mug for good using 45p B&M trick – and I didn’t need a dishwasher
You can also use a cut up lemon as a DIY scrubber to work the mixture in.
For an “extra boost of stain removal”, cleaning pros recommended leaving your freshly scrubbed mug in direct sunlight.
Finally, give it a thorough rinse to remove any leftover paste from the inside.