I might just use the saline every day, and not be as agressive to see if it will heal now. Sometimes we can be so agressive with cleaning and debriding that we can prevent healing. The reason I am saying this is that I was doing some reading about wound care. In the old days, we would do wet to dry dressings with saline or betadine, and then when the gauze was dry, we would rip off the gauze and the infective tissue would come off along with healthy tissue. Nowadays the people who specialize in chronic wounds, tend to avoid the things we used to use like those wet to dry dressings, peroxide, betadine, dakins solution, and many feel that neosporin can even eventually cause a bad reaction with repeated use. It seems that less is more. Watch for signs of infection. Hopefully it will heal, but we are not positive that this is only an infection versus a tumor.