I love to use left over citrus to refresh my garbage disposal. We do a lot of cooking in our kitchen and this is a perfect way to get rid of raunchy sink smells. Just:
- Slice the citrus into 1/2 inch slices
- Spread the sliced fruit across a tray and freeze for two hours (or until they are completely frozen)
- Store the frozen citrus in a jar, bag or tupperware in the freezer.
We keep a jar in our freezer just for frozen citrus slices.
To refresh the garbage disposal, drop one piece of the frozen citrus down the disposal and turn the disposal on. A fresh citrus scent should waft out of the disposal, leaving no trace of whatever garlic, onion or other noxious smells were plaguing it before. You can do this multiple times, but it's best to use one citrus slice at a time.