cleaning a sofa about a year ago, i noticed a distinct pinking effect before my very eyes. I panicked, my heart almost stopped, then i remembered a traing course with Derek Bolton.... i misted over the area with my spray bottle of rinse x, it was corrected
instanty, i considered the £85 course cost fully paid for. Never had a problem since, but always have a misting bottle of acid rinse on hand. Carpet wise, not a major issue as im using f90 on virtually every thing.......................