Study Less, Learn More?

I have not been studying Korean. I am being very lazy about it.

Yet I don’t seem to be losing my passive Korean. I can pick up something which was difficult to read six months or a year ago and understand much more of it than before

There has to be a happy medium between “studying so much my brain can’t process it” and “studying so little that my passive understanding increases while my active understanding slides back.”

I need to find that happy medium.