Why does my melasma return the second I stop using brighteners? Is "maintenance" the only way?

Hello! I’m a huge fan of the approach to hydration, but I’m struggling with hyperpigmentation. I’ve tried every Tranexamic Acid and Vitamin C serum out there. They work for a bit, but the pigment always comes back the moment I have a "lazy" week.

I’m starting to realize that maybe there is no "cure" for melasma, only long-term management. Is anyone combining their routine with a prescription-strength melasma management approach?

I’m curious if you guys layer things like Hydroquinone or Tretinoin under your favorite essences, or if that’s too much for the skin barrier. Any insights are appreciated!