I have a GE gas stovetop and one of the back burners is no longer lighting. I have soaked and cleaned all removeable parts and dried them to no avail... nothing is clogged. I have also tested to see if the electric starter is still flicking when I turn on one of the other burners, and it is. I can't figure why it won't light as the gas passes by the electric starter. Any ideas or suggestions on how I can fix this?