Yeah, you don't really need to treat every week. Although I know some do. You could cut back to like once a month if you insist on treating. Or, if you still are wanting to treat more often, then try getting your paper towels ready in advance and hit the bottom of them with a light mist of PAM and let them dry and use them when needed. Kinda like pre-treating the towels. PAM has a long lasting effect, so it should not lose its effects. And it's the fumes that are the most harmful to the snakes.

just a thought