| Clue | Source | Date |
|---|---|---|
| Substance used to get rid of splotches | USA Today | 22 Jul 2022 |
| Pollution solution, of a sort | Wall Street Journal | 12 Dec 2020 |
| Spot treatment | LA Times Daily | 16 Oct 2019 |
| Spot treatment | The Washington Post | 16 Oct 2019 |
| Spot treatment | ||
| Spray 'n Wash or OxiClean | ||
| It may work on the spot |