Why the Hidden Buildup Happens
Minerals from hard water, fatty acids from soaps, and airborne dust fuse into stubborn films that wedge into microscopic pores along grout, under faucet bases, and inside door tracks. Warm humidity accelerates growth of biofilm and mildew, turning harmless residue into sticky sludge that resists casual wiping. Understanding this chemistry guides safer cleaners, smarter dwell times, and targeted agitation that finally breaks bonds without scouring away protective coatings or etching delicate surfaces.