The oven—an appliance we use several times a week without necessarily thinking about maintenance—until the day suspicious smoke or a burnt smell reminds us it’s there. Yet, neglect comes at a real cost, one that shows up directly on your electricity bill.
According to Delcourt (a supplier specializing in professional cleaning products) and various consistent technical sources, a dirty oven consumes 15% to 25% more energy than a clean one to reach the same cooking temperature. This excess consumption is caused by two combined factors: first, greasy residue on the walls compromises the appliance's thermal insulation, forcing it to heat more intensely to compensate for heat loss; second, these same deposits interfere with temperature sensors, skewing readings and causing the oven to use extra energy to reach the actual target temperature.
This figure prompts us to rethink a common habit: putting off cleaning with the intention of tackling it during the "next big clean." However, the most drastic solution isn't necessarily the most economical one. The pyrolysis cycle—often viewed as a miracle cure that solves everything at once—carries a significant energy cost: according to several guides on electricity consumption, a full cycle uses an average of 3 to 4 kWh, costing between €0.75 and €1.01 per use. That figure adds up quickly if you get into the habit of running a monthly pyrolysis cycle automatically, rather than basing it on the actual level of grime.

What the task actually entails

Cleaning the oven involves removing food residue, grease splatters, and charred stains that have accumulated on the walls, the oven floor, and the door. Allow about 10 minutes for routine maintenance before grime builds up significantly; this time increases considerably if you wait until residues have hardened and become encrusted.

Tips and tricks for a high-performing oven

Quickly wiping up spills right after messy cooking—while the oven is still warm—prevents residue from carbonizing and makes subsequent cleaning much easier. Adopting this simple habit consistently drastically reduces the need for deep cleaning.
White vinegar, recognized by the National Consumer Institute for its degreasing properties, remains an effective and economical solution for routine maintenance: when sprayed and left to sit for a few minutes before wiping, it dissolves most light residue without the need for harsh chemicals.
For ovens equipped with an automatic cleaning system, choosing a cycle suited to the actual level of soiling rather than following a fixed routine helps avoid unnecessary energy consumption: regular manual cleaning limits the use of pyrolysis to instances of heavy soiling, reserving this energy-intensive mode for when it is truly justified.

Since a dirty oven consumes 15–25% more energy, regular cleaning is not just a matter of hygiene or aesthetics—it is also a genuine way to save on your electricity bill. Frequent, light maintenance is often more economical—in terms of both time and energy—than an occasional deep clean using pyrolysis.