I had a similar problem when I adopted my dog Stedman from the animal shelter. Like you I spent all my extra cash at the vet. I tried every home remedy i could find from bleach to tea tree oil with out any relief. and like you said it left my skin feeling dry tight and extremely uncomfortable. luckily I had a neighbor who is a wrestler, he told me when fighting ringworm he will only use dermariche. He let me use some of his and now I know why! In only moments the pain and itch went away and in only a couple days I was ringworm free :)