I sprayed all my snakes with the nix. I would suggest doing it, letting it dry, and then wiping down the snakes with clean water. Definitely don't put the water bowl back in until a day later to ensure that none of the nix gets in the water bowl. This method worked for all of my snakes with no visible harm at all - just make sure to use the diluted solution, never something concentrated. Either method should work for you though.

Best of luck!