Astonish Specialist Clean & Revive Stain Remover, Removes Ingrained Tea and Coffee Stains, for Cups and Teapots, 350g

This is the only thing that's ever really worked. Steradent-type tablets have done a lot of frothing up and shifter a tiny bit of the tannin. This just shifted it without fuss and without a great deal of frothing. No real scent, no lingering smell. It worked quickly and left the teapot with significantly less stain after just the first application. I was surprised how little was recommended but it worked. A second application cleaned down to the metal and a third shifted the really thick tannin coating the inside of the spout. That had needed mechanical scraping before. Depending on the item, you may need to wipe it from the outside. The slight overflow initially left stains as it ran down the outside, but the second time I just used a bit of the liquid to wipe that off.

It works like magic, as long as you have boiling water. It loosens the tea stains so it is easy to wash out the cup/mug and leave a sparkling clean finish. I really love this product, which I have bought previously.

Absolutely Brilliant !! i was sceptical whether this product would work, as my stainless steel teapot was heavily stained, after just one application, it’s almost there, the outside is good as new, giving the inside one more clean. For the money, this product is a bargain, highly recommend

The product is fine, used before and cleans just about anything. But. Amazons delivery has arrived and one item is damaged and has spilt its contents.

Best product we’ve found. To clean thoroughly cups and mugs that have allowed grime and tannin to build over time. 5 mins before dishwasher teaspoon with boiling water. And come out good as new

I have three badly stainless steel travel mugs i use daily, all where badly stained and although I had tried the usual cleaning methods, nothing really worked well. I saw this by chance, and although I was sceptical, I thought I would give it a try. OMG, I was truly amazed, even when it started to froth over the top of the mug, it had thick brown sludge with it. After an hour, I decided to empty them, I fully expected having to do a second session but, all where sparkling clean. I cannot recommend this product highly enough, I will be buying it again for sure, and telling all my friends about it. For the price it is excellent value, and way easier than mixing stuff up yourself. Only took one before photo, but that mug was the worst one.

Bought this to clean my metal flask and it's amazing, cleaned my flask to look like new inside.

Brilliant, makes cleaning mugs so much easier - just put a dessert full in the mug with hot (nearly boiling) water, I leave overnight. Tea stains gone. Wish I'd bought this sooner.

رهيب المنتج، جربته على كوبين أبيضين كانو غامقين بسبب كثرة شرب الشاي والقهوة فيهم واتبعت الإرشادات وماشاءالله آزال اللون الغامق ورجع لونهم الطبيعي المره الجايه بجربهم على دلات الشاي 👍🏼👍🏼👍🏼👍🏼

Great for cleaning teapots and coffee pots as well as mugs and cups. Gets rid of the stains. Easy to use and goes a long way.

J'utilise ce produit depuis longtemps entre autres sur les surfaces faience qui sont encastrées tels le lavabo, l'évier ou la cuvette des WC. Avec de l'eau bouillante et on attend que le produit agisse, magnifique brillant au résultat.

Awesome for tea stains in cups and thermos

Cleans like magic. It took off all the stains in my sink and large metal tumbler. Wonderful product . It does smell a bit so I wore a mask.