How to remove water stains from thermos bottles?

First, remove the scale in the thermos, add some vinegar and broken egg skins or beans in the water and shake for a while to remove it; Second, remove the scale from the kettle, add some vinegar to the water and cook it, or dry it for a while and put it in cold water, and the scale at the bottom of the kettle will burst. Never use a screwdriver and other pointed tools to clean, which will puncture the bottom of the pot; ; Third, remove the scale in boiling water. In Taobao Store: Taishan Tiangong has a patented product scale filter of 10 yuan, which can easily remove scale, rust and other sediments and suspended substances in boiling water. Fourth, whether it is a kettle or a thermos, it is easy to remove scale by frequent cleaning. Adding vinegar will taste, so you don't need to add vinegar if you clean it frequently. Pay special attention to boiling water with electric kettle. After boiling water, clean the inner wall of the kettle and the electric heating tube in time. It is easy to remove the scale in time. When the scale is thick, it is difficult to remove and affect heat transfer.