One can clean it a bit via crystalization from water but it is hassle and dangerous.
it will loose some of it`s power too as NaOH react with CO2 creating sodium carbonate
use it for cleaning pipes and buy clean lye for swim`s experiments
it`s too dangerous nothin like crystalizing sodium chloride or carbonate
As a kemist I never met ILPT in physical form and never talk to him. He share his wisdom, trough my mind, telepathicly only. Please don`t prosecute me, for his possible illegal activities. He is bonkers about chemistry and doesn`t even exist in this primitive reality !!!