I’ve just purchased your bike chain wax. Do I only apply it to the chain? How about the chain rings?

Yes you only need to apply to the chain…and focus on working the wax deep into the rollers. The deeper the wax penetrates the better the performance. Here is another technique I like to use on a clean dry chain for the initial application. https://www.youtube.com/watch?v=NahOIR-4lwM