My husband has a wound that keeps coming back after 20 years. The wound clinic showed us how to care for it. However, I don't do the debridement and if it is a layer of skin deep or more, he has to go back. We use sterile saline (there is DIY online) to rinse it. Prisma (online)can be bought online. I soak a Prisma piece (cut to size) in saline and put it on there. Then, cut a strip of oil emulsion gauze (online purchase). Then, it gets wrapped in gauze and I use 1" paper tape to hold it closed and also to adhere the gauze to the skin. I prefer to do this after a shower. We change it every couple days, and I wash my hands thoroughly between steps. No peroxide or alcohol.