Magnetic Card failures

[Sylvain Cote]

Great idea, I will try it.

On my side, I have used for many years a Staedler white gum eraser that I rub over the magnetic side to remove the oxidation.
To prevent magnetic card bending I have made a small jig to keep the card in place.
The jig is made with a small piece of wood (where I place the magnetic card) and two clips (to hold the magnetic card in place).
I have one jig for HP-65/67/41 cards and one for HP-71/75 cards.