Quoted from DennisDodel:18% humidity! It's 72% here in St. Louis right now. And that's low compared to the last three weeks. I struggle to keep my home below 50% and that's with a whole house dehumidifier to supplement the air conditioner. Do you guys even sweat?
Yuck. More than likely you have an oversized AC. Next time the house is due for new HVAC system, you might want to go down half a ton or a ton (depending how oversized you are). You can get a heat load calc that should get you in a better place.