Paying for the utilities

[Angelo Llamas]

What would one of you suggest for a medium term operator whose tenants may be over using a specific utility like gas or electric. Has anyone ever made the tenant have to pay for a single utility and have the others be covered. In Modesto it gets really hot during summer and pretty cold during winter. It can get pretty expensive what would anyone suggest or should I write the lease so that the next tenant depending on time of year should I do not include a specific utility and adjust my rent because of it ?