Headlamp condensation, this time a Xenon not Matrix LED

Hi again everyone,

After all the wet weather and a couple of high pressure spray car-washes recently, I have developed quite a bit of condensation in my nearside headlamp of my 2015 C7 A6 Allroad. This subject has had a lot of cover over the years and I've looked at what my searches have thrown up.  After checking for cracks in the lens, and found none, I've tried covering the external lens with aluminium foil and switching on full-beam for 2-30 minutes, with only marginal benefit, and next I'm going to try a couple of applications of hair-dryer treatment on medium heat settings. Responses to previous posts suggest that this may help, but that residual water vapour predictably condenses as the unit cools, so the approach maybe more effective in the summertime, and will certainly require several attempts.

I gather from Gareth's response to an enquiry about condensation in a Q7's Matrix LED Headlight lens in the last year or two that these are sealed units and that not much else can be done. However, mine are 2015 Xenons. I wonder whether this might provide any additional opportunity for sorting the problem?  I note that removing the headlamp unit sounds one hell of a hassle on the C7, as is even changing the bulb.

I don't live in much hope.

Chris