What if you only use mildly acidic foam cleansers because you have sensitive skin?

Since I have sensitive skin, if I only use mildly acidic foam,

Sebum builds up on the face,

You will develop blackheads.

So, if you use a mildly acidic foam in the morning and a regular foam at night,

I used one bottle of mildly acidic,

One container of regular foam

You need to repeat this process to prevent sebum from building up.