I have a Precision Touch 850 gas oven which seems to be baking about 25 degrees to hot. I read the manual on how to adjust but can't figure out how to reduce it. I followed the instructions in the manual and hit the autoset keypad 5 times (equaling 25 degrees) and now, of course, it is 50 degrees to hot. What do I need to do to get it to bake 50 degrees less than what it is?