Quick way to clean silver- and copperware

I've learned a quick and easy way to clean the oxidized silverware and copperware.
Although they don't look that perfect, but it is very quick and cheap to do it.

For silverware:

1. Boil some water in a kettle.
2. Put some aluminum foil in a ceramic or glass bowl.
3. Place your silverware on top of the aluminum foil.
4. Pour about 1-2 tablespoon(s) of baking powder on the silverware and wrap the aluminum foil around the silverware.
5. Pour the boiled/warm water over the wrap. It will take a minute or two before it is clean (depends on how good quality your silverware is)

For copperware:

1. Pour some salt on your copperware.
2. Cut a lemon into a few wedges.
3. Rub the lemon on the copperware with salt. You see immediate change.
   If lemon is not strong enough, pour some vinegar, add more salt and rub with lemon again.

Still have some stains, but not bad for my first round of cleaning... will try again when I have more time