When a surface is so dirty that even a lengthy scrub session hasn’t made a difference, it might be time to turn to a powerful cleaning agent known as trisodium phosphate. That is, of course, if it’s ...

Bathroom glass loses its sparkle fast. Soap scum clings on, hard water dries white, and scrubbing seems to do very little. Across the country, people are reaching for pricier sprays and tougher pads ...