Just because we do something for a long time doesn’t mean it’s the right thing to do. In most cases, forceful irrigation with sterile saline is the best way to handle a dirty wound.

Peroxide is actually a pretty terrible wound cleanser. Does as much damage to the healing tissue as to any bacteria, which is why you seldom see it used in the hospital. Honestly you are better off with lots of clean warm water and mild soap. If you really want to get wild, find some true antibacterial soap with chlorhexidine (hibiclens is the big brand name in the US) and wash the wound with that. Just don’t use it on the face bc it’s really bad for the eyes.