Is the Thermos Too Deep for your Hand to Reach in for Cleaning?

2025-12-01

Learn these tricks

Water is the source of life. In daily life, many people carry thermos cups for the convenience of drinking water!

Especially in autumn, more and more people use thermos flasks. Whether it's hot water or tea, they can keep it warm well and it's more convenient to drink.

However, due to long-term use, a considerable amount of scale and tea stains will accumulate inside the thermos.

If it cannot be cleaned thoroughly, it will definitely affect your user experience and also cause problems with the water quality.

However, traditional thermos flasks are quite deep, and we simply can't clean them thoroughly by reaching out. It's really annoying

In this issue, I'll teach you the correct cleaning method. The dirt inside will fall off by itself and it's very useful.

Tumbler

Why does scale form in a thermos?

No matter how expensive your thermos is, due to long-term use, a lot of scale and tea stains will inevitably accumulate on the inner wall.

This problem occurs mainly because dissolved minerals and impurities in water deposit under the influence of temperature and pressure.

These minerals and impurities, including calcium, magnesium, iron, manganese, etc., react with carbon dioxide in water at high temperatures to form insoluble carbonates and other compounds, which eventually deposit on the inner walls of the thermos to form scale.

If we can't clean up these dirt thoroughly, drinking water is unhealthy and will have an impact on our bodies.

Since our hands can't reach in, how exactly should we clean it?


How can water scale and tea stains in a thermos be quickly cleaned?

1. Vinegar

Vinegar is a very effective cleaner that can remove scale.

Pour some vinegar into a thermos, then add some water, tightly close the lid, and shake the thermos for a few minutes.

Just rinse it clean with clear water. This method is very simple and will not cause any damage to the thermos cup.

2. Lemon juice

Lemon juice contains acidic substances that can remove water scale. The operation method is very simple.

We pour an appropriate amount of lemon juice into a thermos, then add some water, tightly close the lid, and shake the thermos for a few minutes. Then, just rinse it clean with clear water.

This method is also very simple and will add a protective film to the thermos cup to prevent the formation of scale again.

It should be noted that you must never use freshly boiled water, otherwise an explosion may occur.

3. Use salt and toothpaste

Salt and toothpaste make a very effective cleaning combination. Mix some salt and toothpaste together, add some water, and then use a soft cloth or toothbrush dipped in the mixture to gently wipe the inner wall of the thermos. Finally, just rinse it clean with clear water.

This method can not only remove scale but also disinfect and sterilize thermos cups. You can give it a try.


Is there a more convenient way to clean it?

There are many places in the home where scale can form. Besides thermos flasks, kettles, thermos flasks, water cups, tea cups and so on can all have similar problems.

If you don't keep it clean, you will feel very embarrassed when friends come to visit your home.

It will also reflect that the homeowner is not hygienic and doesn't even know how to clean the cups!

It is inevitable that such situations will occur in life, such as water scale, tea stains, wine stains, beverage stains, etc.

Only by learning the correct cleaning method can we meet your usage requirements.

If you think the above-mentioned cleaning methods are rather troublesome, you can also adopt scientific cleaning methods.

For instance, by using this useful "Tea Stain Effervescent Tablet", just 1-2 pieces can quickly break down the dirt inside the thermos. You don't even need to scrub it yourself, saving a lot of time.

The operation method is very simple. Everyone just needs to put two effervescent tablets into a thermos and a water cup.

It reacts quickly upon contact with water, releasing thick decontamination foam that can automatically dissolve dirt.

Using professional tea stain effervescent tablets can achieve thorough cleaning of dirt without any blind spots, and it is much easier than using small tricks.

You can take a look at the cleaning effect below and you will know how amazing it is.

I took out a piece and tested it right away. To my surprise, the effect was so good that it made the kettle look as good as new.

No matter how stubborn the dirt inside is, it can be cleaned immediately and is much cleaner than what you can wash by hand.

When cleaning, it is recommended to use hot water. Only in this way can the cleaning effect be better. When it is left to stand, you will see that the dirt inside has gradually been decomposed.

After using the cups at home for a period of time, you can use this tea stain effervescent tablet to deal with them.

It easily helps you get rid of the old stains in your water cup, making drinking water safer.


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