Can you boil wash SS2 hair?

So I’m aware that the dolls in the ss2 line have poly hair (iirc all of them do? Please correct me if that’s not the case). I was really excited to curl clawdeen and lagoonas hair, but I haven’t boil washed any of my poly dolls before. Is it safe for this hair type? I usually use the straw and bobby-pin method if that helps. Any advice would be appreciated!