remove the stains and cleanse the filth—do away with evil ways; eradicate bad habits and customs
? 政府號(hào)召人民～，移風(fēng)易俗。The government called on the people to do away with their bad habits and transform social traditions.
滌瑕蕩穢穢（垢）dí xiá dànɡ huì
滌、蕩：洗蕩，引申為清除；瑕：指缺點(diǎn)和過失；穢：污濁。比喻清除舊的惡習(xí)。get rid of a bad practice, eradicate bad habits and customs, reform one’s bad habits