My baby boas love to dig around in their aspen. I dont use Eco Earth as I've had issues with it a number of times. Had Gina's mouth literally get packed with it where she couldnt close her mouth. I had to scoop it out with a Q-Tip and then hold her head downward and use a spray bottle to spray the rest out of her mouth. Had to do this twice. Problem was, the sutff is damp. Inside the hide, there is no vents so it got condensation. She would rub up against it and then the stuff would stick to her mouth. It just snowballed from there. Plus Eco Earth never holds humidity for long. The stuff dries out so fast and then gets really dusty. Bottom line is Eco Earth is junk lol.
I hope you are running a t-stat on that heat source. If not, turn it off and go buy a Herpstat NOW!!. There is no excuse for owning a reptile and heater with no t-stat. the t-stat should be purchased before you even buy the reptile.
As for your temps right now, they are fine. I keep all my snakes at 77-79F ambient with 87-88F hot spots with 65-75% humidity. Your humidity is low. You need to get it up to at least mid 60s on the dry end.
Contrary to what a lot of people will tell you, snakes dont need 85+ temps 24/7. They do like it cooler a lot too lol. I very rarely ever catch my snakes on the heat tape. 90% of the time they are on the 77F cool end just relaxing either inside a hide or hanging outside.