Never use Vicks vapo rub, it contains camphor which is poisonous for reptiles and is a common ingredient in "natural" snake repellants.
Same for product with eucalyptus, it's another no-no.
If you are going to nebulize anything, do it with plain water or sterile saline solution.
Or just increase the heat and humidity in the enclosure until you can get the snake to a vet.