Errr the front indicators are in the light cluster, is there really condensation in them?
EDIT: Ah, it's the side ones. use a laminated car to carefully break
the "dirt seal" that may have formed and push the whole thing forward
and unclip the back.
The rear light cluster on the Brera fog up because there are manufacturing faults
between the heat welded outer shield and the actual light cluster as well as stress
fractures around the mounting bolts
I've a thread somewhere detailing how you can unmount them, drill some small holes,
bake them in front of a fan-heater for a long time, seal all seams, cracks,
screw heads and fill the holes with silicone and remount.
(BTW: Not just an Alfa or Brera issue. All car makes with this kind of assembly can
have this issue. Seen it on everything from VWs to Renaults.)