My TEC1-12710 peltier cell not cooling enough
You are getting a difference between the two sides of 30 C, which is pretty typical for peltiers.

You need to cool the hot side better.

You can also try limiting the current, because a bunch of that heat you are seeing is being generated by the peltier itself.  You have to keep in mind how inefficient they are (they create several watts of heat for every watt they move).