How to Clean a Stainless-Steel Thermos Bottle

Today, a thermos is present in almost every home. Periodically, it isn’t easy to make trips, prepare herbal infusions, and do winter walks.

Now let’s dwell on the most effective ways to cope with the problem quickly.



In thermoses made of stainless steel, plaque is formed often because this coating absorbs impurities and odours well, which are pretty tricky to get rid of.

What will we use?

The answer is simple – in fact, only what is available in every home.



Lemon and citric acid are often used to remove contaminants and unpleasant odours. They proved their effectiveness in cleaning the thermos.


If the contamination is too old, this tool may not initially work, so that the procedure will be repeated.

This method works exceptionally well against scale.

Give preference to lemon if you want to remove not only pollution but also an unpleasant smell.


Another well-known folkway.

Barley will play the role of a soft abrasive agent that will help clean the walls of the flask without scratching.



Now we will learn how to wash your thermos of stainless steel inside from an unsightly coating of tea with the help of table vinegar.


  • Fill the flask with three-quarters of hot water. Add vinegar to a thermos until filled.
  • Close tightly with a lid and turn over several times, stirring the liquids.
  • Leave the thermos filled for a few hours, periodically shaking it.
  • Do not forget to rinse the flask thoroughly after you pour the solution.

Important point!

For the smell of vinegar to evaporate completely, it will be necessary to rinse the thermos with lemon water and dry it well.



When removing dirt from the inner surface of the thermos, use simple recommendations:

  • when wearing the bulb, use a brush for dishes, which will help you in cleaning the ingested plaque;
  • do not use abrasive and whitening cleaners, especially whiteness, because there are a high probability not only to scratch the flask, damage rubber pads but also to harm your health in case of insufficient washing;
  • You can damage the thermos with metal brushes and, for example, eggshells, sand.

Everyone understands that severe contamination is better prevented than then removed.

Therefore, rinse and dry the thermos well after each use.

A regular dish brush (not metal) will easily remove a vulnerable plaque to not accumulate over time, leading to neglected situations.


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