We know that one is not yotzeh if he hears Zachor read from a non-kosher Sefer Torah. What is the process of kashering the Sefer Torah so it will be usable? Must one do hag'alah? Does hag'alah work, or do we compare it with earthenware? Furthermore, if it was only used in in a cold setting, is hadacha enough?
(As always, please CYLOR if this is applicable to you in any way.)