I don't understand it, my colby and monterey jack cheese just doesn't melt in the oven. If I take a slice of it and put it in the microwave for a few seconds then it melts fine into a delicious gooey pile of cheese. However, in the oven it simply turns crispy. I made mac and cheese yesterday that simply was not fit to eat because the cheese didn't melt. I don't know what to do or what I did wrong? Help, please.