Condensation in headlight - ventilation tube blocked?

Hi

Does anybody happen to know if and where is the ventilation tube for the right headlight unit in a 2010 Superb? It seems I have the famous feature of VAG products that is accumulating condensation. The headlight is misty on the inside. The problem went away by itself after I took off the plastic cover caps for the turning signal and high beams. I put the caps back on and the next morning there was condensation inside again, which makes me believe the ventilation tube is perhaps blocked by something and I should try clearing it. Problem is I can't see it anywhere. I know there is something wrong with the unit itself because the left one has been completely dry all this time.

I tried looking for myself but its a bit cramped and apparently taking the unit off completely requires taking off the entire front bumper, so not really something I can do in a parking lot of an apartment building.