Scale forming inside a water heater, white spots on glassware, and a filmy feel on skin and hair after a shower are signs of hard water. A softener that stops improving any of this is usually dealing with salt bridging in the brine tank, exhausted resin, or a control valve that has stopped regenerating on schedule.
Between service visits, check that the brine tank has salt and break up any hard crust on top of it with a broom handle, which is often enough to restore a bridged system.
If salt levels look fine but water still feels hard, or the unit will not regenerate at all, stop guessing and call. Smart Pro Plumbers connects Chula Vista, CA homes and businesses with a plumber who tests water hardness and installs, services, and repairs softening systems sized to actual household use. Reach the referral line at (844) 898-0295.