Kitchen grease is one of the most common and most stubborn cleaning challenges in any apartment — but Barcelona's combination of cooking culture, hot climate, and limited kitchen ventilation in many buildings makes it a particularly significant issue. Here's what actually works.
Why Kitchen Grease Is Harder to Remove Than It Looks
Fresh grease is relatively easy to remove with warm soapy water and a cloth. Old grease is a different problem entirely.
When grease is heated and then allowed to cool, it undergoes a partial polymerisation process — it bonds to surfaces at a molecular level and forms a layer that normal cleaning products cannot dissolve. This is the yellow-brown, sticky coating you find on the top of kitchen cupboards, inside oven walls, and on tile splashbacks near the hob. Standard kitchen sprays remove fresh grease effectively; they do not remove polymerised grease.
What Actually Works on Different Surfaces
Tile Splashbacks
What works: Alkaline degreasers (look for products containing sodium hydroxide or potassium hydroxide as active ingredients). Apply to the tile, leave for 5–10 minutes to dwell, then scrub with a non-abrasive pad and rinse thoroughly.
For baked-on grease: a steam cleaner used before the degreaser softens the deposit and significantly reduces scrubbing effort.
What to avoid: Abrasive pads on glazed tiles scratch the surface and make future cleaning harder. Acidic products (vinegar, citric acid) do not work on grease — they work on mineral deposits. For grease, you need an alkaline product.
Hob and Burners
Gas hob grates can be soaked in warm water with degreaser for 30 minutes, then scrubbed and rinsed. Cast iron grates should be dried thoroughly immediately after to prevent rust.
Glass ceramic hobs require specific ceramic hob cleaner. Standard degreasers can damage the surface coating. Baked-on residue should be removed with a ceramic scraper held at 30 degrees, not scraped aggressively.
Oven Interior
Oven interiors require the strongest degreasing products available. Commercial oven cleaner (sodium hydroxide based) is the most effective domestic option. Apply to a cold oven, leave for the manufacturer's recommended time (typically 4–12 hours or overnight), then wipe and rinse thoroughly. Ventilate the kitchen well during this process.
For self-cleaning ovens: follow the manufacturer's instructions. The self-cleaning cycle is effective for moderate buildup but not a substitute for degreasing the oven door seal, racks, and surfaces that the cycle doesn't reach.
Extractor Fan and Filter
The extractor fan filter is one of the most neglected kitchen cleaning tasks. A saturated grease filter no longer extracts effectively — it redistributes cooking odours and particles back into the kitchen instead of removing them.
Metal mesh filters can be soaked in very hot water with concentrated degreaser or dishwasher powder. Leave for 30 minutes, then scrub and rinse. For heavily saturated filters, replacement is often more practical than cleaning.
The Barcelona-Specific Problem: Heat and Cooking Intensity
Barcelona's climate means kitchens are warm for a large portion of the year. Heat accelerates grease polymerisation — grease on surfaces in a warm kitchen bonds faster than in a northern European apartment. If you cook regularly and don't have effective extraction, this means kitchen surfaces in Barcelona apartments require more frequent degreasing than you might expect.
How to Prevent Grease Buildup
- Always use the extractor fan when cooking — including for boiling and steaming, not just frying
- Clean hob grates weekly rather than waiting for buildup
- Wipe tile splashbacks after cooking while the grease is still warm
- Clean the extractor fan filter monthly
Casa Fresca Barcelona includes thorough kitchen degreasing in every deep cleaning service. We use professional-grade alkaline degreasers and steam equipment to remove built-up grease from tiles, hobs, oven exteriors, and extractor fans.
