... the use period is generally 3 months. Therefore, time should be replaced with a towel. If the towels ... cleaned and disinfected once a week, the best time drying or dried; greasy towel change after the ... . Boil the water first with a towel about 10 minutes, and then use soapy water to clean, dry ... The towel into the pressure cooker, heat for 30 minutes or so, can kill most microbes; chemical disinfectants ...