1. Just put about half an inch of apple cider vinegar inside the glass.
2. then cover the top with a piece of saran wrap. Make sure it’s secure around the edges.
3. Then take a toothpick or screwdriver, and poke holes all over the top.
4. Now set it behind where your fruit usually is. Making it look “hidden” is key. I like to put it behind my fruit bowl and lean a zip loc bag against it.