How does the coconut bark feel (i.e. is it damp?)? Because the humidifier got your enclosure to such a high humidity, the bark may have absorbed alot of moisture. It may take a while for the moisture to evaporate out of the bark and lower the humidity. I would just keep an eye on the humidity....if that is the case, it will probably drop by the morning. If the problem persists tomorrow evening, I would do away with the bark and just use the newspaper...that should knock down the humidity a good bit.