Cleaning tea stains?

[NightOwl]

What is a good way to get tea stains out of mugs?

[weebitty2]

you can soak them overnight in dishwasher detergent and water ..

or :

denture cleaner tabs. Works great for coffee stains too.

or:

you can scrub with a paste of baking soda and water, or rub with a lemon slice.

[PikkuMyy]

Bon Ami scrub cleanser - doesn't scratch, natural

Cream scrub cleanser by a natural company like Ecover or 7th Generation

both work equally well. I've also done the lemon/baking soda.