To remove cooking spray residue from glass, you can effectively use Bar Keeper's Friend and some effort.
Stubborn cooking spray residue, often referred to as "polymerized oils" when it hardens, can be tough to scrub away with just soap and water. A proven method involves using a specific cleaning product designed to tackle such build-up.
Using Bar Keeper's Friend
Based on tested methods for surfaces like glass and stainless steel, you can use Bar Keeper's Friend and a little elbow grease to remove any polymerized oils. This product contains oxalic acid, which helps dissolve the rust, tarnish, and mineral deposits that ordinary cleaners can't, and it also has mild abrasives that can help lift stubborn residue like baked-on oils without scratching glass if used properly.
Here's a simple process derived from this method:
- Wet the Residue: Lightly dampen the area of glass with warm water where the cooking spray residue is present.
- Apply the Cleanser: Sprinkle a small amount of Bar Keeper's Friend powder directly onto the wet residue.
- Initial Rub: Give the area a quick, gentle rub using a soft cloth or non-scratch sponge to spread the cleanser and start working it into the residue. This is where the "little elbow grease" comes in.
- Allow it to Work: Let the paste sit on the residue for a few minutes (e.g., "walk away for a few minutes"). This gives the oxalic acid time to break down the polymerized oils.
- Scrub and Rinse: After waiting, gently scrub the area again to lift the loosened residue. Rinse thoroughly with water to remove all cleanser and residue.
- Dry: Dry the glass surface with a clean cloth for a streak-free finish.
This method is particularly effective for the tough, sticky film left behind by repeated use and heating of cooking sprays on glass oven doors, microwave plates, or glass bakeware.
