Tee tree oil... Safe for corn snake?

[Maddiek714]

Recently, I've found an at-home remedy to "cure" my snake of his respiratory infection. He has no bubbles in or around his mouth, but he wheezes alot. I've read that a combination of Vick's vapor rub and eucalyptus oil will help with the problem. I don't have Vick's, bit I have something very similar. It contains eucalyptus oil, tee tree oil, and other essential oils. Before doing this experiment, I did research and found that tee tree oil can be harmful to snakes, but the person who said this was responding to someone who was actually rubbing the oil on their snake to treat mites. Would tea tree oil still be toxic to snakes if it were only inhaled by the snake? Thanks in advance.