I have a #10 can of dried potato slices from 1999. I just opened them and they made the "wish" sound, so I know they were sealed well, however, they are brownish in color. They smell fine and are crispy (no moisture in the can). Do you think they just were out in the air too long before they dried them or perhaps they overdried them and they got a little dark. Input would be appreciated. Thanks in advance.