Historical clue formulations

• What mascara might do — 2025-07-02
• Photocopy flaw — 2022-03-09
• A fingerprint can leave one — 2020-05-03
• Mark that might be left with greasy fingers — 2013-11-04
• Makeup mishap — 2011-01-04
• Target for a gum eraser — 2005-04-08
• Printing goof — 2002-10-10
• Artist's goof — 2000-09-23
• Photo marrer — 1999-03-21
• Soil — 1998-06-18
• Soot mark — 1996-04-28
• Smeary mark — 1995-01-05
• Blur — 1994-11-01