Humidity is high in DFW right now so you’ll see more condensate coming off the coil. Lick it to verify 
This same condensate is what kills coils. It soaks the insulation and it rusts from the outside in. It doesn’t rust from the inside out because rust can only continue in the presence of oxygen. I have a trick for it but it’s a bit advanced. The easy route is drilling weep holes in the bottom of the tank. Blow up through that hose running through your floor board. Maybe it’s clogged? That’s a condensate drain. That alone isn’t enough.
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