HUMS
| Date | Clue |
|---|---|
| 2025-10-25 | Runs superbly |
| 2023-03-28 | Purrs, as an engine |
| 2022-05-29 | Runs well |
| 2021-08-09 | Carries a tune, in a way |
| 2020-07-16 | Doesn't remember the words, say |
| 2019-04-14 | Runs perfectly |
| 2018-03-14 | Plays a kazoo |
| 2014-11-27 | Operates perfectly |
| 2014-06-28 | Runs smoothly |
| 2013-07-25 | Keeps one's mouth shut? |
| 2010-06-11 | Runs smoothly |
| 2009-02-01 | Symptoms for a car mechanic |
| 2005-03-20 | Drones |
| 2003-06-08 | Runs smoothly |
| 2001-06-09 | Bustles |
| 1999-10-11 | Accompanies musically sans words |