What should I do if the towel turns yellow and becomes hard after being used for a long time? Teach you how to clean, clean and soft after washing! Add some salt to clean water, soak it in a dirty towel for about 5 minutes, and then scrub it clean. Add proper amount of white vinegar and softener to clean water, soak it in a dirty towel for 5 minutes, and then scrub it clean. Why do towels harden? It is because some minerals in the water we usually use can be dissolved by water, such as calcium and magnesium. In the soap we use, there is a substance called sodium fatty acid. When sodium fatty acid meets calcium and magnesium in water, it can become insoluble sediment, which will remain in the fibers of the towel and the towel will become hard. When the hardened towel is boiled in alkaline water or vinegar, these deposits can be removed and the towel will become soft again.

Put the towel in hot water with washing liquid, boil or iron it for 5 minutes, and then wash the towel while it is hot. Wash towels frequently, and cook them with soap, washing powder or lye for a few minutes every once in a while to prevent them from hardening. Towels should be completely immersed in water when boiling, so as to avoid oxidation in contact with air and reduce softness. When washing the towel, put the towel in strong soap solution, vinegar water or alkaline water and boil it for a while. When cooking, soap should drown the towel. Then rinse with clean water and warm water several times in turn, and dry with water in a ventilated place. After drying, the towel will become soft again. Need to be reminded that towels should not be exposed to the sun for a long time, and it is best to put them in a ventilated place to dry naturally.