Well I'm not sure whats wrong with keeping it at 70%, but anyhow, if I understood your question correctly, I'd suggest taking it out of the humidor and leaving the humidifier to dry for a day or two, yet keeping a close eye on your humidor, then when it starts to drop to the % you want, put the humidifier back in and see how it goes . I'm assuming you've over wet it, so it just needs to dry.