Bitul of Keilim (Bitul and Blios #41 - Shulchan Aruch YD 102:2-3)

Bitul of Keilim: Non-Automatic Heter; Kashering; Expense, other factors; Aino ben yomo; Pesach; Tevillas Keilim. See seforim by Rabbi Cohen at ⁠⁠⁠⁠⁠⁠⁠⁠⁠www.kashrushalacha.com