Hello! I got the GF1 today and thought I would take a few test shots sat in my room. At first the pictures didn't have this strange little blurry thing on it: View attachment 159031 but then after about 10 minutes: View attachment 159032 This blurry, blotchy little thing seems to have appeared! I bought a lens/filter cleaning pen when I got the camera earlier on (the assistant reccommended it) and I've even used that on the filter but it doesn't seem to have helped!! Should I take the filter off (he put it on for me in the shop) and try cleaning the actual lens or is the problem something else?