Historical clue formulations

• Diluted, as a drink — 2019-02-04
• Like light beers — 2017-05-17
• Weak, as a brew — 2013-12-11
• Like some eyes and soup — 2010-12-23
• Thin, as oatmeal — 2004-11-22
• Diluted — 1998-02-05
• Thin — 1997-12-21
• Thin, in a way — 1996-05-09