This packet was stored under my sink. The coupon expired in 2015.
Today was the day I decided to use it. It's lemon scented. Take rubber hole liner out.
Run hot water. Run disposer. Turn disposer off. Slow water stream down to width of pencil.
Place packet in disposer drain.
Turn disposal on. The packet will break open. The contents will foam. Mine foamed up in the adjoining sink as well.
It takes at least 2 minutes before the blue foam subsides.
Turn disposer off.
Rinse the remaining residue and you are done.
Our disposer switch is in the cabinet below our sink.
Replace the rubber guard.