I'm working on my thread resurrector merit badge and figured this would be a good one...
I realized on really hot days, a portion of the filter pads on my cooler were drying out and allowing warmer air through that area.
After looking at water flow and distribution I realized my pump just wasn't moving enough water. Bumped up to a larger water pump, and have had no problem keeping the filters wet and the whole house around 70 with an occasional bump to 74 in the heat of the day on the 95+ days.
And the extra humidity is great for my complexion.