I don't think they bothered cleaning up the brick when it was stained during construction. How many LEED points do they take away every time you have to acid wash your exterior facade?
They did clean it at one point, you can see some photos a while back. I'm not sure who posted them, it looked nice and clean. Parkside is LEED, brick is acid washed on all areas where the scaffolding has been removed.
I've noticed some areas where sediment is starting to show on the completed section of the ARIA (east side of the tower, near the penthouse) as well