All well built clocks require regular maintenance the same as any mechanical device. Your car, for instance, requires periodic oil changes, tire rotation, etc. to keep it performing in top condition. So it is with your clock as well. I recommend re-oiling the clock every 5 years, at which time I will inspect for any additional needs and advise you about them. Just like your car, regular maintenance will prevent costly repairs or even the need for replacement of the mechanism.