I had same problem on 2001 s80 t6. To expedite condensation removal, remove both (high and low beam) covers and lay a hair dryer so it blows in one opening and (therefore) out the other. Drys it out in no time. Cleaning the internal side of the lens is another issue. I will post my solution when I ...

Ps, there is a spray of cleaner just for the maf.

I had same issue. What codes do you get from OBC?
You might try cleaning the MAF sensor. Or, just replace it yourself for about $150 and 15 minutes work.