I have been using mms on my dog internally and externally for some time. I am detoxing him as he has some cancer issues. I have found that the detox is happening through his tail area and he has had large areas that have been red skin like sores. I have sprayed mms on one area as usual but instead of it clearing up in a couple of days -it has gone into a large hard area where the fur has stuck to it. AS if it is like glue. It is very hard and I am not sure how to clear it. I probably should have washed the area with water between sprays-any suggestion?