68?? heck I put both mine down to 58 and the fan on auto or high to start out and There has been a lot of posts about improving the whisper air here that work(I have posted a few) but the first thing to do for a quick improvement right now is Take off the louvered vents so the air shoots straight down instead of the hot ceiling then when you get time go to the search function and type in Whisper air mod or A/C mod and you can do the other improvements when you get more time like this notice the PVC pipe in the vents to prop up the duct work ,I also did this to the intakes/return to suck more air IN to the A/C Mine works great now
