HOMEMADE JEWELRY CLEANER-worked fast & thoroughly on the silver necklace I made. Less effective on brass (or whatever my "travel" necklace is), but it did brighten it somewhat. Regular jewelry cleaner was NOT effective on either one.
Baking soda used to freshen carpet instead of expensive carpet sprinkle stuff! To absorb stale odors from carpet (and to generally freshen up a room), scatter soda on it, wait a few hours, then vacuum up the powder.