Name of the action of scraping pottery with a cloth in Koho language (Krăngọ village)

Ma Ly says the name of the action of scraping pottery in Koho language. She says first “kor”, which can be translated as “to scrape”, then she also says “kor góh” where “góh” refers to pottery. The scraping of pottery is made with a ring made of a thin slice of bamboo with both ends tied together, called a kơnur.