Why your range hood stays greasy even after scrubbing it clean

January 17, 2026

Every home cook knows the frustration of a greasy range hood that seems immune to cleaning efforts. Despite scrubbing, wiping, and using various cleaning agents, the stubborn residue reappears, leaving many wondering why this happens. A range hood, essential for kitchen ventilation, is constantly bombarded with cooking fumes and steam, leading to persistent oil buildup. This article delves into the reasons behind this recurring problem and provides effective strategies to keep your kitchen space pristine.

The Nature of Grease and Oil Buildup

When cooking, especially with fatty or oily ingredients, vapourised grease is released into the air. This grease condenses on cooler surfaces, such as the filters of the range hood, accumulating over time. Traditional cleaning methods often fail because they merely move grease around rather than eliminate it. In many cases, using water-based cleaners can exacerbate the issue by making the grease more sticky rather than breaking it down.

Choosing the Right Cleaning Product

The key to tackling grease effectively lies in using the right cleaning product. Oil-based cleaners are particularly effective because they work as solvents, breaking down the grease more efficiently than water-based options. Consider a product specifically designed for kitchen surfaces or a homemade solution made from vinegar and baking soda, which is both economical and effective.

Maintenance Tips for a Cleaner Range Hood

Regular maintenance is crucial. Cleaning your range hood at least once a month can prevent grease buildup from becoming overwhelming. If cooking heavily greasy foods, increase the cleaning frequency. Remember to focus on the filters, as they trap most of the grease and require washing or replacement to maintain extraction efficiency.

Deep Cleaning Techniques

For a truly thorough clean, employ a two-step method. First, apply the chosen cleaning solution liberally and allow it to sit for several minutes to soften the grease. Then, scrub with soft-bristle brushes designed for kitchen surfaces. Avoid abrasives that can scratch or damage your range hood’s surface, particularly if it’s stainless steel. Afterward, it’s wise to revisit and ensure that a second wash captures any remaining residue.

Maximising Your Range Hood’s Performance

To ensure the longevity and efficiency of your range hood, consider the following strategies: always turn the hood on before cooking to catch fumes early, and ensure your kitchen’s ventilation system is properly configured. A well-maintained range hood not only maintains a cleaner kitchen but also enhances overall air quality, reducing the risk of harmful particles lingering in your home.