Mix together the white vinegar and epsom salt in a small container. Whisk in the lemon essential oil, and pour into the mold cavities. Place in the freezer and allow to fully freeze.

Once the mixture is fully frozen, place 3-4 cubes into the disposal and turn on. Allow the disposal to grind the cubes to release the lemon smell. Follow with boiling water for extra freshening. Use as often as needed.