The bill rose during summer break, winter break, spring break, or any period when children were home for more daytime hours.
More daytime occupancy can change several small habits at once: electronics, cooling or heating schedules, showers, laundry, dishes, cooking, and lighting. The total bill can rise even without a broken appliance.
Check first
List extra daytime hours at home, gaming, computers, TV, laundry, showers, and snacks or meals.
Check whether thermostat schedules changed because rooms were occupied all day.
Compare daily kWh and water use against a normal school week.
Review billing days and seasonal weather so break usage is not overstated.
Practical savings moves
Use device sleep settings and reasonable screen-area power strips.
Batch laundry and dishes instead of running many small loads.
Keep thermostat schedules realistic for occupied rooms.
Track daily usage so the family can see whether changes worked.
Avoid these mistakes
Do not blame one gaming console if HVAC or laundry changed more.
Do not compare school break bills with months that had very different weather.
Do not make rules that are too annoying to last more than a week.