How can I reduce humidity inside my home during a Columbia summer?

Direct Answer: To lower indoor humidity, you should ensure your HVAC system is properly sized, use a whole-home dehumidifier, and keep your "Fan" setting on "Auto" rather than "On."

In the Midlands, outdoor humidity often stays above 70%. If your AC is too large (oversized), it will cool the air quickly but won't run long enough to pull the moisture out, leaving your home feeling "clammy."