The side rubber (gasket) of my refrigerator is turning black. How can I clean it? I used vinegar and lemon, but it's not effective.
It's most likely mold, and you'll get the best results from some proprietary mold remover spray or liquid that simultaneously kills the mold to inhibit further growth, and bleaches it so the remnants/any staining of the substrate becomes less visible
Mix baking soda, water and vinegar in a plastic container and apply directly to the mold. The mixture is best sprayed on from an empty window spray type bottle. The mixture will fizz and become inactive so has to be used immediately after mixing.