It worked the first couple times i put it on, now, it’s not really working anymore

I bought the patches (i hope that’s what i was supposed to get). Last time i was able to get the little hard scab off, it was yellowish hard stuff in her foot, a very small bit. I tried for like an hour to get it out, tweezers, squeezing, resoaking, repeat, couldn’t get it out. The skin around the scab is very hard. I reput a corn patch on it today and i’m going to wait a couple days to take it off.
I’m also worried about the skin between her toes. It’s been wrapped for so long that the skin is now kind of squished down between her toes