My husband recently cleaned our stop top; and one by one the knobs won’t turn. I seemed to have locked itself. I found the bottom of my drawers and lower cabinets with a puddle of water. I don’t think that the water could cause the knobs to lock. Please help save this stove top before we go and buy a new one. Thanks 
Did you ever find an answer to this? Mine is doing the same thing. I have a 5 burner stove and the two right side ones are freezing up. Right back is frozen solid, right front very sticky. Thanks for any suggestions!