I just cleaned the mechanism lightly. It didn't need much. It runs as quietly as a Telechron would be expected to. There's a slight rasp to the rotor if you put your ear within a few inches of the clock, but I have heard much louder ones. What I need to address is a hum from the coil. I think it's due to the way I have the cord secured inside the case. I'm going to pull the back cover and reconfigure it, and that should eliminate the hum. But to put things into perspective, I'm sitting less than two feet from the clock right now and don't hear a thing. And I see it's just about 4:30 AM in Singapore.