Hello Rabbi Reuven, We have some glass plates that we haven’t used in over 6 years and would like to start using them again, however; we can’t recall if they were used for meat or parve and most likely they were used for hot food. We did not use them for dairy. We want to kasher the dishes now and use them for parve. Can we soak them for 24 hours for three days, changing water in between or just wash them thoroughly? Also, please explain the process for second-hand non-kosher glass dishes. Thank you for your time.

Asked on August 10, 2020