Historical clue formulations

• Ventilate thoroughly — 2021-02-02
• Make less stuffy — 2019-02-03
• Let breathe, as stinky shoes — 2017-10-08
• Clear the atmosphere of — 2012-02-26
• Clear of stale smells — 2004-06-14
• Freshen — 2002-10-17
• Ventilate — 2000-10-16
• Talk over — 1997-02-22
• Freshen — 1996-07-05
• Freshen — 1995-07-08