#4 Unbeknownst at the time, the copper connections would create copper spurs (natural copper does this) and by blowing on an cartridge that was unused for a while and wiping the spurts off, would make it work again.
#4 Unbeknownst at the time, the copper connections would create copper spurs (natural copper does this) and by blowing on an cartridge that was unused for a while and wiping the spurts off, would make it work again.