@Mercedes69 You're a very experienced host with 89 mostly great reviews. I would have assumed based on this that you already figured out how to configure your utility cost into your room rate!
But if you haven't, now is the time to do so. Take a closer look at your bills to make sure your nightly rate accurately reflects your guests' utility usage, and raise your rates accordingly if it doesn't.
If you want to be able to bill your visitors for utilities, Airbnb is probably not the best platform - that's something that only makes sense for landlords with long-term tenants.