Add more liquid solution at will, in order to increase the humidity as needed. For example if you want to keep it between 65%-72%, it may be a good time to add more liquid when you hit 66% to prevent getting behind the curve. If you’re having issues with low humidity, consider using the stronger Winter Solution which contains a higher distilled water content.It works both ways. If you are having issues with high humidity, we recommend taking out the tray completely while the humidity goes down.Please contact us at help@caseelegance.com if you are experiencing any high or low humidity issues in your humidor.