I recently got to tour the Toshiba Science Museum where the replica is running. One of the employees checks the clock "about five times a day" when he's workin

I recently got to tour the Toshiba Science Museum where the replica is running. One of the employees checks the clock "about five times a day" when he's working. He checks the accuracy of the western style clock and the humidity in the glass case in which the clock is housed. I don't recall at what percent they keep the humidity, but they have packets hidden under the clock which release moisture and absorb moisture as needed from the air in the case.