Wow! Bogertophis gave quite a bit of valuable tips. Simply, I would consider raising both the cool side temperature and the warm side temperature to start. 85F is a bit low for the warm side temp in ball python comfort zones. You sound like most other areas of the husbandry is pretty good so congrats. The temps and humidity are factors that will affect the reptiles establishment and behavior for sure. So consider that firstly. Once a ball python lays eggs and those eggs are removed for artificial incubation, the scent of the eggs needs to be removed . Otherwise, the animal will remain “ off feeding”. The python should be wiped down and rinsed off with a safe soap like a Dawn dishwashing soap. They can be allowed to soak also and rinsed off with clear, clean water. The environment, tub and contents should be washed and rinsed thoroughly as well. Once dried off and the scent of the eggs is removed the quicker the animal will get back on food. Usually, but not always.