My FEMALE spider has been off for 5 months now. It's not so weird though, I tried to breed her last season with no results (I actually stopped breeding since she was only 1400grams at that time). It seems like she will only eat the food if I leave it in the tub over night, I have never seen her strike and constrict. Any thoughts about this?

It is not much you can do about ball pythons going off food, sadly.