If you want to throw away underwear, you can put it in a black plastic bag and throw it directly into the trash can. Underwear is a relatively close-fitting clothing, so you need to pay special attention to cleaning and keeping it of clean and tidy.
Underwear and underwear need to be replaced regularly. For underwear, if the frequency of cleaning is not particularly frequent, it can be replaced every six months. For underwear, it needs to be replaced with new ones every three months, and underwear needs to be replaced every day. It needs to be cleaned.