Took the time while my front bumper was off to polish my foglights! They were ROUGH. Took almost an hour to sand back to smooth plastic that didn't have rocks and shit embedded in it. Almost 9 years of road grime erased!
As to why the bumper was off.. had a little bit of condensation in my passenger side headlight so I took that out and tried resealing it, made sure everything was seated right. Replaced the breathers with the OEM ones off my halogens. Doubt it'll make much of a difference but anything helps.
Reminds me of why I wanted OEM 135i lights and not aftermarket.. but the deal was amazing and they work great.
ALSO. I'm working on this car at a record pace. I swear I could lift the car onto jacks and remove the front bumper in like 15 minutes.