Lactic acid-based resin bed cleaner formulated to remove precipitated iron and related fouling from resin beds, brine wells, and softener equipment surfaces. Restores exchange capacity that iron contamination quietly degrades over time — the type of fouling that ordinary regeneration alone will not clear. Suitable for manual softeners, automatic systems, and central regeneration facilities; add through the brine well prior to regeneration for corrective treatment, then maintain at lower ongoing dosing. Rinses free of foam, colour, and salt residue. Fits iron control and resin maintenance programs in commercial, institutional, and industrial water softening operations where loss of capacity, reduced water quality, or shortened resin life is being driven by iron buildup.