Glue a neodymium rod magnet (for example S-06-25-N
) or several small disc magnets (Caution, don’t use magnets that are too strong!) to the head of a thick nail and insert the nail into the chuck of a drill or cordless screwdriver.
Then, with the watch a few millimetres away, start operating the drill at low speed.
Now very slowly move the drill away from the watch to a distance of about 10 cm.
The result in my case: The watch is again keeping accurate time!
I had this idea because the local watchmaker wanted to charge an unrealistic price for a demagnetisation with special equipment and estimated that this procedure of a few seconds would take one week.
What works for watches can also be applied to other objects.