I just picked up a used Canon TL-55 1.5x Teleconverter off of Ebay. Anyhoo... it was described as "like new", upon receiving the lens I noticed that there is a considerable ammount of "grime" in between the two lenses. I'm not sure if moisture or what somehow made its way in between the lendes, but you can clearly see the grime here
I contacted the seller and am awaiting his response, but in the mean time. Do you know if it's possible to remove one of the lenses or somehow clean in between them?