Tell me your beginner skincare “fail”

I thought it would be a fun discussion.

What was a mistake you made with your skincare when you were just starting out, not knowing what you know now?

When I started taking my skincare more seriously in high school, I used witch hazel as my toner. Which is fine, may work for some people but I was completely disregarding the fact that I have dry skin. So yeah!

Oh and before that, I used the biore charcoal cleanser everyday, morning and night.