Sharpening Can Opener?

[pamperedbecky]

Is there are a little trick to sharpening the can opener? If that's even possible. I know about chopping aluminum foil with the food chopper to sharpen those blades and I thought I remembered hearing something similar with the can opener, but I tried it and I can't get it to go through. I have a customer saying hers doesn't work anymore so I thought I'd try to give her a suggestion.

Thanks!

[ChefLoriG]

umm, I don't think the foil in the food chopper actually sharpens the blades, that's a myth. I think with the can opener, once it's dull you need a new one. Has she had it long?