You need to clean the glass, or look for nicks in the rounded edges of the disk or glass surface.

It shouldn’t click.

If it is clicking it is: hitting an object on the glass or moving over an imperfection in the steel disk (or more rarely an imperfection in the concave glass surface).

It might make an interesting effect to have intentionally spaced grooves that run along the edge that the disk rides on, it might add another “track” to the sound the disk makes during its cycle.

The spacing between grooves could change (not be a fixed spacing of, for example: 1mm. But change gradually from 1mm to .2 then back) It might follow a curve. The grooves might also change angles.)

The small, cold shiny puck spins like there is nothing else in the world. Nothing else to stop for or look at. It goes around in off balance circles making the clicking sound like a helicopter about to take off the ground, it will fly to new places and reach new heights. You can feel the faint wind emerging from the spinning object, it brushes your face with such a gentle touch. The clicking gets faster then slower then faster. It gets to where the puck is spinning so quickly the wind has gotten more powerful the clicks have all blended into one single sound. The sound is plain and simple yet so complicated. The sound enters my ears and rattles it with the waves. It can be compared to so many things, helicopter blades, a rushing wind, or a runinng horse. The puck stills spins, sounding like it could go forever and as it reaches its fastest spinning motion it stops. The silence is still, it is haunting. The sound that once got faster has now faded into silence. There is nothing more to hear, or to listen to. The soft spin of a shiny puck is now nothing but a mirror and a hard piece of metal that once made a sound.