How to Clean Range Hood Exterior and Shroud of Grease

Range hoods collect grease on the outside just as relentlessly as they do on the inside. The shroud—that metal or plastic panel surrounding the ductwork—and the exterior surfaces catch airborne oil spray, dust, and cooking particulate that builds up into a sticky, darkened layer. Left unattended, this buildup becomes harder to remove and can actually promote rust on metal hoods. The difference between a kitchen that looks maintained and one that looks neglected often comes down to this one visible surface. Cleaning it properly means using the right degreaser for your material, applying enough time for the product to work, and finishing with a technique that leaves no streaking or residue.

1. Know Your Surface First. Look closely at your range hood exterior to identify whether it's stainless steel, painted metal, or plastic. Run your finger along the shroud to gauge how thick the grease layer is. Fresh grease comes off easily; month-old buildup will need longer dwell time with degreaser. Note any visible rust spots or discoloration so you know what you're working with.
2. Protect Everything Below. Remove cookware, utensils, and items on and around the stovetop. Lay down newspaper or a drop cloth underneath and around the hood to catch drips. This is not optional—degreaser runoff will stain countertops and floors.
3. Cross-Ventilate Now. Open windows and doors to create cross-ventilation. Turn on exhaust fans in bathrooms if available to help pull odors out of the kitchen space. Even mild degreasers can create strong fumes in a closed room.
4. Choose Your Weapon. Choose between a spray degreaser for light to moderate buildup or a paste degreaser for heavy, caked-on grease. Read the label to ensure it's safe for your hood's material. If you have a stainless steel hood, verify the product won't dull the finish. For plastic shrouds, avoid caustic products that can crack or discolor the material. Pour or prepare your chosen product in a spray bottle or mixing bowl as needed.
5. Spray and Let Sit. Start with the metal or plastic shroud surrounding the ductwork, as this is typically the most visibly greasy surface. Spray or apply degreaser generously but not dripping. Begin at the top of the shroud and work downward so gravity helps the product flow. Let the degreaser sit for 2 to 5 minutes depending on grease thickness—check the product instructions. Do not skip the dwell time; it allows the chemical to break down the grease bond.
6. Agitate the Grease. After the dwell time, use a soft-bristled brush, microfiber cloth, or non-abrasive scrubbing pad to work the degreaser into the surface. Use circular motions on flat areas and focus on any visible grime, fingerprints, or buildup. For textured surfaces, a soft brush works better than cloth. Do not use steel wool or abrasive pads on stainless steel, as it creates permanent scratches.
7. Flush It All Away. Wipe down the shroud with a damp cloth using plain water. Go over it multiple times, wringing out your cloth frequently, until no soap residue remains. Degreaser left on the surface will re-attract dust and grease quickly, so this step is not cosmetic—it's essential to your result lasting.
8. Work Section by Section. Move to the main hood body—the visible front and sides. Apply degreaser the same way: spray generously and let sit for the recommended time. Stainless steel hoods should be treated with degreaser applied along the grain direction for best results. Work in sections if your hood is large—don't try to degrease the entire exterior at once, as the product on the first section will dry before you finish the last.
9. Hit the Hidden Spots. Scrub the hood body using the same soft-brush technique. Include the bottom edges, the front panel where handles are located, and any textured or slotted surfaces that trap grease. The face of the hood directly above the stove accumulates the most grease, so spend extra time there. Seams where the hood connects to the wall or cabinet also need attention.
10. Multiple Passes, Fresh Water. Wipe down the entire exterior hood body with a damp cloth, using the same wringing-and-re-damping approach as the shroud. Make multiple passes until the water runs clear and no degreaser residue remains. Check the seams and edges carefully—these hold onto residue longer.
11. Dry with the Grain. Use a clean, lint-free cloth to dry the entire hood and shroud. This prevents water spots and ensures a polished appearance. Work methodically from top to bottom. For stainless steel, dry with the grain. Pay close attention to seams and edges where water pools.
12. Restore the Shine. If your hood is stainless steel and looks dull after cleaning, apply a stainless steel polish or mineral oil. Spray it lightly onto a cloth and wipe it across the hood surface following the grain. This restores shine and provides a protective layer against fingerprints and new grease buildup. Use sparingly—over-polishing creates a slick, slippery surface.