How often should you steam your face in a week?

I've started at once a week for about 5-10 minutes. I've started steaming my face to soften my pores so it makes it easier to remove my blackheads with my extractor tool. It also helps to clear my nose when I've got a cold. Is once a week enough or should I do it more often?
Also once I've removed the blackhead, how do I stop the pore getting blocked again and forming another blackhead? It seems every time I remove it, it gets blocked again.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).