I Googled high and low for an explanation about WHY this keeps happening, and all I found were half-assed solutions like putting wax paper down on top of the cupboards. I'm looking for the cause of this greasy residue. I very rarely fry anything, I use oil to cook maybe 2-3 times/month the rest of the time I bake or steam whatever I cook. I just don't get why the top of the fridge, the countertops and the cabinet doors are squeaky clean yet this greasy residue at the highest possible point in my kitchen. Ideas?