I think your handling to much and I think your temps are all over the place.
First snakes dont "like" to be handled, they tolerate it. Second your ambient temps should be around 75-80. Your cool side should be around 80-82 and your warm side should be 90-91.

Also as an observation, I see more people post about aggression who keep there snakes in Tanks and that use heat lamps.... weird.

I use a rack set up with Flexwatt and I never expierence any kind of aggression what so ever.