Not many people know that this substance is used in the cleaning of large hotels and museums. Glycerin is a cheap and effective substance that prolongs cleaning time. When dusty furniture, glass, mirrors, and floors are wiped with two drops of a microfiber or nylon towel, a very thin, invisible, transparent film is formed, which prolongs the time of dust retention. Even the old parquet floor has a shiny color when it is wiped with water. Glycerin also removes stains from fruits and fruit jams, which can be removed by soaking the stained area in glycerin and rinsing with a little salt water. There is no one who does not know the cosmetic use of glycerin. Apply on its own or in addition to a base oil on cracked, chapped feet, hands, and callused skin on your feet. Also, when you add one drop to your shampoo for one wash, it works to make your hair shine.