How to wash college students' underwear is an interesting question. On our planet. Men, women and children, or what you call college students. Honey, underwear is washed with water, soap and laundry detergent. Or add soap that is now used to wash underwear. The state does not stipulate that college students' underwear must be distinguished from others' underwear when washing. College students have only increased their knowledge. In fact, we are all human beings like normal people. So you don't need to worry about college students' underwear. I can tell you for sure. Even the prime minister washes underwear in the same way as normal people.