I'm running gel for electrophoresis process. At first, there are bubble after I switch on the machine. Then, I let it for about 1 hour. When I check it after that, there are no bubbles and the machine isn't warm at all. I don't know what happen with it. Then, I realise the white wire in the red side inside of the machine is not in place as in the black side. Could it be the reason? Or is it about the buffer? Really hope someone can help me. Thank you. Below is the image of the white wire.