No matter how deep or dirty the thermos is, here's a trick for you

In the cold winter, having a thermos is so important that you can drink a cup of hot water every day. 

But after using our insulated cup for a period of time, there will also be a lot of dirt inside it, 

which is very difficult to clean. Today, I will teach you a few tricks and learn them together with me.

Our thermos cup is used every day. After a period of use, there will be a lot of dirt inside the thermos

 cup, including a lot of dirt on the cup mouth. How do we clean

 the thermos cup? It's actually very simple. We can use the salt we often use at home.

Next, we pour in some clean water. The salt we just poured in is granular and has strong friction

 ability. Pouring it into a thermos can achieve a good effect of removing 

dirt. Finally, we screw on the lid and shake it for two minutes.

Next, we pour in some clean water. The salt we just poured in is granular and has strong friction ability.

 Pouring it into a thermos can achieve a good effect of removing dirt. 

Finally, we screw on the lid and shake it for two minutes.

After shaking for two minutes, we can see that the salt inside has melted away and has been cleaned up almost completely.