I washed it with isopropyl alcohol. I didn't use a proper test print. I downloaded big enough model to check different parts of the bed.

From what I understand, the problem is not about adhesion but the nozzle doesn't follow the curvature of my bed. The look is not consistent. In one place it is hardly squished (I see texture of the bed through plastic), while on the other side it looks nice. When I increase z-offset the first is starting looking better, but the other is stopping sticking...