I was shootijng and noticed two spots which I thought were on the lens but was on the adapter itself and I think it's on the glass that it nearest to the camera (that attaches to the DVX) and I was wondering if I should use lens cleaner and a cloth? I tried to use the q-tip but it didn't work. It's not dust but a water stain (best way I can desribe it) - imagine if a drop of water came on it and you didn't wipe it away and two days later you have a "stain"... It's two small marks that show up when I shoot with the Letus and it's bothering me...