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Hello,

I have a small emergency field compass that was kept unused in a pocket on
my mountain bike for the last 10 years. I took it out recently and
discovered it had become very sluggish.  I suspect that the magnet under the
compass card has lost much of its power and canot overcome the friction
between the compass card and the needle it floats on. I cannot open it to
get to the needle and clean its tip.

Is there a way to recharge the magnet? I tried placing the compass overnight
on magnetized objects like my phone handset or a large screwdriver but I
suspect I need a stronger source of magnetic field. A 220V wire leading to
an operating house appliance perhaps?

Any advice would be much appreciated.

   

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