VAPOR
| Date | Clue |
|---|---|
| 2025-09-23 | Humidifier's output |
| 2025-07-30 | Trail left by a jet |
| 2024-09-16 | Fog or mist |
| 2024-02-22 | Steamy stuff |
| 2020-03-04 | E-cigarette output |
| 2018-04-28 | Fog, e.g. |
| 2017-09-29 | Contrail contents |
| 2017-04-03 | Moisture in the air |
| 2016-08-28 | E-cigarette output |
| 2015-03-07 | Boiling evidence |
| 2012-09-06 | Clouds, e.g. |
| 2012-03-11 | Kind of trail |
| 2006-11-08 | Something in the air |
| 2005-07-25 | Water in the air |
| 2005-05-29 | Exhaust, perhaps |
| 2005-05-12 | Contrail content |
| 2003-03-19 | Steam, e.g. |
| 1996-12-10 | Gaseous mist |
| 1996-08-27 | Fog |