Grease is one of the most persistent and underestimated challenges in maintaining a kitchen. It accumulates gradually, almost invisibly at first, coating cabinets, walls, splashbacks, and appliance surfaces with a thin sticky film that attracts dust and hardens over time into a stubborn, discoloured layer that's difficult to remove. Beyond aesthetics, accumulated kitchen grease is a genuine fire hazard, and it degrades the surfaces and finishes of your kitchen far faster than almost anything else. The good news is that preventing grease buildup is largely a matter of using your cooktop and rangehood correctly and building a few simple habits.

Why Grease Spreads So Far

When you cook — particularly when frying, stir-frying, sautéing, or searing meat — tiny droplets of fat become airborne in the steam and smoke above your cooktop. These aerosol droplets travel with the air currents in your kitchen and settle on every surface they reach. Without a functional rangehood capturing them at the source, grease particles travel surprisingly far — onto cabinet doors, the tops of refrigerators, light fittings, and walls. In open-plan kitchens, they can reach furniture in the living area.

Even with a rangehood running, some grease will always settle on nearby surfaces — the goal is to minimise what escapes and intercept as much as possible at the source.

Using Your Rangehood Correctly

The most impactful single thing you can do to prevent kitchen grease buildup is to use your rangehood correctly — which most people don't. The most common mistake is turning the rangehood on only after cooking has started and smoke or odours have already appeared. By that point, a significant amount of grease-laden air has already escaped the capture zone.

The correct approach is to turn your rangehood on before you start cooking, ideally two to three minutes before placing anything on the cooktop. This gives the fan time to establish the airflow pattern above the cooking surface, creating a continuous draw that captures steam and smoke from the moment it's generated. Professional chefs and rangehood manufacturers alike recommend this habit, and it makes a measurable difference in how much grease escapes into the broader kitchen.

Similarly, leave your rangehood running for five to ten minutes after you finish cooking. Residual steam, smoke, and airborne grease continue to rise from the cooktop and food for several minutes after the heat is off. Running the rangehood through this cooling-down period captures a significant proportion of what would otherwise settle on your kitchen surfaces.

Fan Speed and Cooking Intensity

Matching your fan speed to the intensity of your cooking is important. Most people default to one fan speed regardless of what they're cooking, which means they're either running higher than necessary (more noise, more energy) for gentle simmering, or running at low speed when they're doing high-heat frying (where more extraction is needed).

As a general guide: use low speed for gentle simmering, heating, and slow cooking; medium speed for most general cooking including sautéing and steaming; and high or boost speed for frying, stir-frying, grilling, or any cooking that produces visible smoke or strong smells.

Splatter Guards and Lids

Splatter guards and lids don't just keep your cooktop cleaner — they meaningfully reduce the amount of grease that becomes airborne in the first place. When frying meat or vegetables in oil, a splatter guard placed over the pan catches the explosive droplets at the pan level, reducing the airborne grease burden your rangehood needs to handle. Using lids when boiling, simmering, or steaming reduces steam output, which also reduces the airborne grease transport (steam carries grease particles along with it).

Regular Wipe-Down Habits

Surfaces closest to the cooktop — the splashback, the front of nearby cabinetry, and the rangehood's external surfaces — accumulate grease faster than surfaces further away. A quick wipe-down of these surfaces every week or two, before grease has a chance to harden and oxidise, takes only a few minutes and prevents the hours of scrubbing that a heavily built-up kitchen requires. Warm soapy water on a microfibre cloth handles fresh grease easily; a diluted kitchen degreaser spray is useful for weekly maintenance.

The Role of Clean Rangehood Filters

This is worth repeating: a rangehood with clogged, saturated filters is operating at a fraction of its designed efficiency. The airflow is restricted, meaning less of the grease-laden air above your cooktop is actually being drawn into the hood. Cooking with dirty filters is almost as bad as cooking without a rangehood at all in terms of grease migration. Monthly filter cleaning (or more frequently if you cook daily) is the most important maintenance habit for keeping kitchen grease under control.

Addressing Grease That Has Already Built Up

For surface grease that has already accumulated and hardened, commercial kitchen degreasers work well — apply, allow a few minutes of dwell time, then wipe away. For stainless steel surfaces, a degreaser followed by a light buff with baby oil or stainless steel polish restores the finish and leaves a surface that resists future adhesion. For painted or laminate cabinet surfaces, avoid harsh solvents and stick to pH-neutral kitchen cleaners that won't strip finishes.

The combination of correct rangehood use, regular filter maintenance, and a consistent light cleaning routine is the most effective system for keeping your kitchen grease-free over the long term.