Coach,
I suspect you’re softener was improperly set up resulting in overdosing and or too frequent regeneration.
A cubic foot of standard resin can be regenerated to 75% of its capacity with 6 pounds of salt. The remaining 25% requires nearly 12 more pounds of salt. Its extremely inefficient to regenerate a softener to 100% capacity. Some fine mesh resins can achieve 75% capacity with 4 pounds per cu ft.
Nearly every system I’ve serviced is grossly over salting...probably due to installer negligence, inexperience, or profit motive, i.e. they work for a company that sells softener salt. No names mentioned but...it starts with C.
Unless your raw water is so hard you get bruises when you shower, there’s no way a “real slow wash” should ever use 80 to 120 lbs of salt per week.
Just sayin.