This cooktop has been acting a bit odd for awhile. Occasionally, while not in use, it would click (the sound they make when you've turned the knob to ignite the gas burner); I'd have to unplug it to get the constant clicking to stop and leave it unplugged for awhile, maybe the rest of the evening, then it would be fine. As of yesterday, my wife went to turn on a burner and she said it was like, orange/blue flame came out from right below the knob. I have unplugged it, because I don't want our house to explode. The electrode seems to be burnt for the burner that this happened to. Any ideas?