DROSS
| Date | Clue |
|---|---|
| 2025-08-07 | Useless leftovers |
| 2023-06-24 | Rubbish |
| 2021-05-15 | Rubbish |
| 2019-07-11 | Rubbish |
| 2019-03-13 | Metallic waste |
| 2017-11-26 | Waste |
| 2016-01-31 | Impurity |
| 2013-01-06 | Wastage |
| 2011-10-26 | Impurity |
| 2011-07-06 | Smelting byproduct |
| 2010-07-23 | What's discarded |
| 2009-09-02 | Refuse |
| 2009-07-05 | Chaff |
| 2008-09-20 | Trivial stuff |
| 2008-07-30 | Cast-off material |
| 2008-05-24 | Worthless stuff |
| 2007-01-07 | Waste |
| 2004-02-01 | Waste |
| 2002-11-28 | Waste matter |
| 2002-10-27 | Refuse |
| 2002-04-28 | Metal waste |
| 2001-11-29 | Waste |
| 2000-10-25 | Worthless material |
| 1999-12-08 | Smeltery waste |
| 1999-06-27 | Refuse |
| 1999-04-15 | Waste |
| 1998-03-08 | Chaff |
| 1997-10-15 | Smelting refuse |
| 1997-05-25 | Rubbish |
| 1997-05-09 | Slag |
| 1996-09-01 | Impurity |
| 1996-04-13 | Chaff |
| 1996-03-13 | Smelting waste |
| 1995-07-30 | Refuse |
| 1995-05-17 | Waste |
| 1995-05-12 | Refinery residue |
| 1994-09-04 | Refuse |