There is simple method, although you might not belive it is a serious one = use CocaCola, original one, and place the carb inside
and check time to time... You might not believe, but it is true that the original CocaCola is a very aggressive chemical and if you
place thin blade inside of CocaCola cup for overnight, next day morning you see what is the "impossible " thing, just at room
temperature, no heating needed.