No, keep the warm side warm and the cool side cool. A cool side of 69 is not the end of the world, and is actually just fine. What you can do to help increase air temps for your little guy is to put a towel or something similar over the top to keep the warmer air inside the tank. Insulating the tank (a towel or blanket works) also will help keep the warm air from dissipating into the glass and then into the cooler air of your home.

You can add another small heat pad to the side of the cage, as well as underneath, to help bump up the warm side a bit without cooking the cage. A 25 or 40 watt heat light on the top (again, on the warm side) shouldn't be too much for the cage, and would increase temps just a few degrees, which is all you really need.

Adding hiding places over the heat pad, and piling moss around it as well, will also help create a warm hiding spot - and if you keep the moss moist, it'll act as a nice humidity boost, keeping your snake's skin beautiful.

Hope that helps!

-Jen