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 ...

You can’t scrub oil and grease stains away. The trick is to draw them up out of the concrete with trisodium phosphate (or a TSP substitute), water and an absorbent material. Patience is the key. Old, ...