This worked for me, maybe will help someone else?

I got rid of mine by draining using a needle sterilized with alcohol, then rinsing thoroughly with Listerine, THEN applying Glyoxide (canker sore medication) for about 2 minutes, then rinsing that. The debriding agent removed the dead skin, keeping the wound from refilling. After about 1 1/2 weeks, all gone!

Glyoxide is available OTC. My sister who is a nurse suggested this treatment. I am not a health professional, but this worked, so I thought I'd pass it on!