Today I heard the pump making much more noise than usual, unplugged it and made sure nothing was clogged and put it back. It was quiet for several hours after that then the noise came back even worse. Was examining it and realized the wires are exposed right at the base! Is that why and is the pump no longer usable? I’m assuming it’s not because of the exposed wires. I did buy the pump used and had no problems for a few months until today.