Probably the type of soap. Are you using a rinse agent such as Jet Dry. It does make a difference.
you do use a dishwasher, remove the pieces before the drying cycle. If the flatware is sterling, then it's a better idea to wash them using a milder soap than is used by the dishwashing machine.
Yes, but you can't put sliver in the microwive.
depending on the brand, thick expensive tupperware yes, but cheep zip lock stuff no.
Silver tarnishes from reacting with Oxygen in the air (The stuff we breathe, if you don't know, I highly doubt you don't know) thus forming tarnish.
Stacy Silver is the actor and Czechs, a star in Big Toys, No Boys 2