When we wash our face and bath, the free calcium and magnesium ions in the water combine with soap to form calcium and magnesium soap, which will adhere to the fibers of the towel. After a period of time, the towel hardens and accumulates more calcium and magnesium soap.
Soften the hardened towel. First, put the hardened towel into the boiled alkali water for about 15 minutes. When the temperature is suitable, rinse it with water and rinse it with a stove. It is better to cook it for 10 minutes or more. Then take it out and rinse it with water. Dry it and find that your towel is soft again, bright and watery, just like the new one.
The washing powder is alkaline, so you can put the right amount of washing powder in the water to melt it.
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