1. It is recommended that users wash their underwear and outerwear separately.

2. Worn clothes can contain various bacteria. For instance, undergarments may have bacteria that fall off the skin surface and are excreted through the intestines and urinary tract, such as Staphylococcus and Escherichia coli. The outerwear exposed to dust also contains countless bacteria, including some powerful pathogenic bacteria, such as Staphylococcus aureus and hemolytic streptococcus.

3.According to statistics, there are 10 to 100 microorganisms per square centimeter of area. Even if detergent is used for cleaning, only 80% of the bacteria can be removed. The bacteria that slip through the net can also cause cross-infection. Therefore, when soaking and washing clothes, it is essential to wash underwear and outerwear separately.