I have a 1.5 year old canon ixus 115hs. Recently i used it much roughly, for macro shots, and now it has got some fingerprint, and some minute dust on it. I fear even touching the lens, so never tried to clean it. I asked the canon service guys, they tell me it will take 15 days, but i need it urgently, so cant give them. Anyone got any ideas about how to clean the lens, also the lens is very small. I read somewhere that cleaning with even distilled water will wash away the powder coating on the lens, thus fading the original color production of the camera. Shall I go to some digital studio or do it myself?