Are you sure that the humidity in your house is usually 60 percent or higher? I have several battery operated devices in my house, and the humidity has been between 39 and 44 percent for the past 24 hours. I maintain a temperature of 78 degrees, and the humidity is rarely above 50 percent. I would suggest that you buy a few devices to measure the humidity inside your house from Amazon or Home Depot and monitor your humidity.
It looks like you may have a small leak inside your air handler but I don't think that would have a major effect on the humidity in your entire house.
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