Realigning a compass

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MudBug

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We have a box that several compasses were stored together in. Either they messed with each other or the box was placed near a strong electromagnetic source, but none of these compasses have any idea which way north is.

I have watched a video where a simple box compass, common among Boy Scouts, was corrected of this problem by sweeping a strong magnet along the length of the compass needle.

However this doesn't seem to be working for me.

Does anyone have a suggestion on how to get these compasses back into proper operation?
 

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