Quote Originally Posted by kinley View Post
...it helps the humidity stay nice and high
You don't want the humidity high right now. You want it relatively dry and you want your ambient temps warmer than normal. The skin involvement that you can visibly see may be infected tissue, but it may also be sterile reaction to a systemic infection (usually antibody complex mediated), but even if it is not itself infected, it is prone to getting infected. Either way, moisture is your enemy right now. If your vet isn't willing to at least aspirate and culture some of the fluid and give you a prescription for silver sulfadiazine cream, and if you aren't able to get to the other vet, then PM me, and I can walk you through some things that you can do at home, cheaply, in lieu of euthanasia, if you want to try that.