Heavy-Duty Tile Stain Remover for Biological Stains

The user has severe, persistent stains on tiles, possibly from bodily fluids, that resist various strong cleaners (bleach, acids). This indicates a demand for a specialized, highly effective, yet tile-safe stain remover designed to tackle old, set-in, and potentially biological stains that are resistant to common household and even industrial cleaners. A product with specific enzymatic or oxidative properties, along with clear application instructions for different tile types, would address this challenging cleaning problem.