So, my newly purchased 2013 came with ‘extreme’ condensation trapped within both headlight units. Being somewhat cheap and always seeking the easiest remedy to nearly everything, I settled on removing all three round covers in the rear of each unit … one about 70mm and the other two about 30mm. I just left these off for a couple of warm sunny days and overnight. Sure enough, all the condensation is gone (for now). No doubt there’s some kind of water leak/s in each unit … but I’ll sort that later. I did also pull off the ‘rubber’ seals on each cover and rolled them back on themselves … thus putting the compressed surface (after twelve years’ use) in the back and the nice new springy surface now the working seal surface. I also put a light coating of lithium grease on these new surfaces before reinstalling. We’ll see how it goes. Cheers.