We have a double range and a white refrigerator. We're now finding that no matter what we do, we cannot get the white plastic parts to come clean. It's getting so bad that we're thinking of ordering new parts to replace the older ones (and possibly in black where possible).
Before we go this drastic route is there a solution to this or, as one of the installers noted years ago, it will continue to get dirty and reach a point where you can no longer get it white again.