Historical clue formulations

• Sign of romantic chemistry — 2025-04-11
• Energizing force — 2024-10-23
• Fire starter — 2023-08-14
• Fire starter — 2017-10-23
• Catalyst — 2017-05-14
• Little starter — 2011-12-30
• Start of a fire — 2011-08-08
• Fire starter — 2007-03-20
• Catalyst — 2006-07-09
• Fire starter — 2005-04-11
• Kindle — 2004-05-30
• Initiate — 2003-04-06
• It may light your fire — 2001-03-11
• Activate — 1999-01-30
• Fire's start — 1998-10-26
• Fire starter — 1997-02-10
• Explosion's cause — 1996-10-08
• Flash — 1996-09-18
• Plug outlet — 1995-04-28
• Sweethearts' electricity — 1994-04-24
• Bit of excitement — 1994-03-27