I am in meetings all day with only short breaks so hopefully someone will jump in here. Since you lost about 6ppm FC overnight, you have a chlorine demand that will take time, energy, and faith to get rid of.

But, if you commit to the process, eventually you will get to the point where you only have to use about 2 jugs a week, not a jug/day.

For now, keep putting in bleach and raise that FC. I will check in later.