I have a gas stove a Maytag Performa barely past the 5 year warranty on electrical parts (naturally), and the baking temperature inside the stove does not maintain the temperature setting, if I set the temp to 400 degrees via the electrical setting switch, it will reach that temperature and then begin to decrease down to about 200 degrees and not rise again, so I switch from bake to broil and once the broiler flame ignites, which usually takes awhile, I switch back to bake and only then will the temperature maintain the desired 400 degrees once reached and stay there, i'm not sure if this is a problem with the elctrical switch or possibly grease in the jets, i tried using the self clean feature several times to clean out grease possibly from the jets but that didnt solve the problem, i have not spilled grease inside nor is the stove at all dirty, the stove uses the same compartment for baking and broiling, the broiling flame from above and the baking flame from underneath the pan beneath the grill, any thoughts on how to fix this myself?