Sadly, I don't have too much money to afford a vet. Today I soaked my King snake in warm water (was told to do so a vet) and he started breathing out of his nose all funny then he started to exhale out of his mouth then a minute after doing so he started open mouth breathing. Are there any home treatments I can do to help fight off this RI? So far I've noticed these symptoms:
Open mouth breathing, popping, bubbles in mouth, and strands of mucus when slightly opening the mouth.

I really REALLY care about this snake, and I would be heart broken if he had to suffer since I can't afford a vet right now.. So if there are any home treatments or anything I could get from the stores please tell me the name of it. I raised his temps to 85-90 to help fight off the infection, and he soaks in his water dish. Help