These cabinets were first painted with oil-base paint about 10 years ago and have been painted over at least 4 times (changed colors). The last 4 years (or so) a foggy film develops on the door surfaces and face frames. We've tried several methods of cleaning (soap/water, vinegar, windex, swifter pad, etc.) all to only a very short fix (few days to 1 week) swifter pad works best and is easy to do. Any suggestions short of replacing the cabinets? No animals, no fry cooking, non-smokers.