Historical clue formulations

• Low scorer on a pH test — 2026-07-27
• What gives a wine tartness — 2026-04-26
• Influence on the Beatles' "I Am the Walrus" — 2026-04-03
• Certain psychedelic — 2026-01-30
• The "A" in DNA — 2025-10-06
• What wine or citrus adds to a sauce — 2025-08-31
• It burns — 2025-05-22
• Word before rain or wash — 2025-04-06
• Component of an exfoliator, often — 2025-03-28
• Not a base — 2025-03-25
• Vinegar, e.g. — 2024-07-07
• Base's opposite, in chemistry — 2024-06-17
• Something people trip on — 2024-01-29
• ___ rock — 2023-06-18
• Like biting wit — 2023-03-14
• Something a person typically drops on purpose — 2022-10-22
• Drop it! — 2022-03-10
• "Salt Fat ___ Heat" (popular cookbook) — 2022-02-23
• "He'd be a broader guy if he had dropped ___ once": Steve Jobs on Bill Gates — 2022-01-04
• You'll trip on it if you drop it — 2022-01-03
• Very harsh, as comments — 2021-11-30
• Kind of rock — 2021-11-06
• Battery liquid — 2021-10-26
• Word with rain or rock — 2021-09-11
• The "A" of DNA — 2021-07-12
• Something you might trip on — 2021-06-15
• Sharp — 2021-06-11
• What's anything but basic? — 2021-04-28
• Bitter — 2021-03-07
• Biting — 2021-02-21
• Chemical that burns — 2021-02-15
• ___ jazz — 2020-06-06
• If you drop this, you're sure to trip — 2020-06-03
• It's below 7 on the pH scale — 2020-05-12
• Gastric juice, e.g. — 2020-01-14
• The "A" in DNA — 2020-01-06
• Word with rain or rock — 2019-06-05
• Anything but basic — 2019-05-26
• Biting — 2019-01-18
• At the lower side of the pH scale — 2018-09-17
• Litmus paper reddener — 2018-06-19
• Sharp — 2018-05-04
• Gastric ___ — 2018-03-19
• Tums target — 2017-11-28
• Battery fluid — 2017-08-28
• Sharp — 2017-07-09
• Alkali neutralizer — 2017-04-11
• Biting — 2017-01-12
• Anything below 7 on the pH scale — 2016-10-24
• If you drop this you'll trip — 2016-09-27