Hi. Chametz dishes that are cleaned (not kashered), and then used on pesach, can be used after pesach, or is chametz she-avar alav pesach?
Chametz dishes that were not kashered special for Pesach should not be used on Pesach! The reason being because the taste of the chametz will ruin the Pesach food. In retrospect if they were already used and it is after Pesach, they may be used. They are no worse then any chometz dishes that weren’t used during Pesach – the absorbed taste is not included in chometz sheavar alav haPesach.