How long does it take pores to open?

I know that pores open when u steam ur face or put hot water on it, but How hot does the water have to be? How long do u need to keep the water on ur face for them to open? Do they open automatically? I don%26#039;t know so I am asking you.


any extra info?|||When you steam your face or put hot water on it, the process will accelerate cleansing and that will facilitate you to remove dirt from your face and you know that pores remains always opened.|||pores are always open, thats why peoples%26#039; faces get oily--