Subbed.
Your temps are staying that way because you aren't accounting for ambient temps.
Your fan is sucking out hot air but your other fan is sucking in hot air. Temps stay the same because all of the air thats being moved around is still hot. I'm high, so bare with me. Think hot day on the highway in your car windows down. Yeah your moving fast. Yeah the air is blowing by you, but it's still hot as heck in your face. Wonder why? All of the air is the same temps even with the air moving it's still hot. ...
Solution: find a way to get fresh air in there, cooler air. Turn your ac up so outside the suitcase it's colder and get your intake to pull the cooler air from outside, in.