While it's easy to see when the outside of a teapot needs cleaning, we sometimes neglect taking a good look at the inside of our teapot. Once we do, we might be astonished at how black and grimy it looks! This is not necessarily a bad thing, if your teapot is made of stainless steel. This porous material actually allows tea to build up in it, enhancing the taste of your tea. If you use your teapot for other reasons, however, and don't want that tea taste all of the time, you will need to clean out your teapot.
Fill your teapot with hot water and swirl it around a bit with a tablespoon of salt. Rinse out the teapot and let it dry. Do not use soap because the frequent use of soap will cause the stainless steel to eventually absorb some of the soap, giving your tea or hot water a slightly soapy taste. Using hot water and salt is the best cleaning method if you want to use your teapot for tea only because it will leave the tea oils in the stainless steel.
Boil hot water with a tablespoon of vinegar inside the tea pot for around 3 minutes. This is a good method to remove old tea stains and oils, which is important if you want to use the tea pot for something other than tea. Rinse the tea pot with hot water and let dry.
Scrub the tea spout with a baby-bottle brush. The brush is the perfect size to get all the way into the spout and clean it thoroughly. Use vinegar and water, or if there are crusted-on stains, use a paste made from baking soda and water. You can also use the baking soda paste and a soft rag for stains on the inside of the tea pot as well. Rinse thoroughly and let dry.
Do not use any type of abrasive scouring pad on stainless steel because it could scratch it.