foto: Instagram/@nichaluthfiah
A thermos is a practical tool designed to keep drinks hot or cold for hours. With these advantages, the thermos is ideal for everyday use because of its comfort and efficiency in one easy-to-carry package. Made from quality materials such as stainless steel with a double vacuum layer, the thermos keeps your drink at the desired temperature, even when carried outdoors.
However, a thermos that is used continuously can experience quite annoying problems, such as the appearance of black crust on the inside. This black crust is usually formed from drink residue, dirt, and mineral deposits from water left in the thermos. If left alone, black crust can affect the taste and cleanliness of the drink stored inside.
However, this problem not only reduces the comfort of using the thermos, but also has the potential to affect the user's health. Black crust that accumulates can become a breeding ground for dangerous bacteria and microorganisms. If not cleaned regularly , a flask full of scale can become a source of contamination which has a negative impact on health.
Unfortunately, even now, there are still many people who are confused about cleaning thermos bottles, especially if they are crusty. It takes a brush and special cleaning agent to make the crust really come off. Luckily, an Instagram user @nichaluthfiah once shared a simple trick for washing a thermos full of black crust.
Through one of the uploaded videos, he admitted that he only used one simple ingredient. Reported by BrilioFood from Instagram @nichaluthfiah on Tuesday (30/7), the simple ingredient in question is citrus.
Next, close the lid and shake the thermos so that the citrus inside can dissolve. If so, let it sit and soak the thermos for 1-2 hours. A mixture of citrus and hot water can help remove stubborn black crust in the thermos.
 Instagram/@nichaluthfiah(brl/mal)
