Canon Ae-1 shutter misfiring

[samn09]

Amongst the many posts about shutters misfiring on a Canon AE-1, I can't find one relating to this: Note - I have taken the base off and manually triggered the shutter and shorted the circuit, which fires the shutter ok.

Every 3 cycles of the shutter, the magnet gets stuck, always 2 perfect, 3rd stuck. I have cleaned the magnet with no luck. New batteries inserted too. Any thoughts?

 

[loccdor]

Don't know how similar this might be to the Canon T90's magnet problem but I've solved that before by leaving the shutter open on bulb mode overnight. My murky memory about it recalls that it demagnetizes it. It became a problem after leaving it in a box 10 years - after the treatment, no further issues.