By Robert from Philadelphia, PA
I have never heard of a machine that does this, but what I do is put some nice-smelling perfume or oils around the top of the bag. I have a lot of old body sprays in scents that ended up not working or me but they still smell good, so I spray the bag with those too.
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Why pay extra money for the scented bin liners (garbage or trash bags), when all you need to do is wipe a liner with a little vanilla essence or a bit of lemon juice.