Effective and easy! So after I had read some forums and reviews I have come to this method ... Background: My sensor (NEX-6) has been relatively dirty after a stupidity from me ... So needed a wet cleaning. Only I had respect for ... From scratch etc ... but with the right tools is no problem. The important thing is that one uses appropriate soft, lint-free cloths (PEC PAD) and the right solvent. High-purity ethanol (I used) or methanol (Caution poisonous) are here the best and only choice. (All other solvents can damage the plastics camera attack) to try and look Previously best on a clean mirror if everything evaporates without residue. Now with the wall and the moistened cloth as the Fensterabziehen from one side to another draw. Maybe repeated. Smallest lint then blow. That's it! :) Cheaper as it gets and is really good! But be careful if the chip a low-pass filter made of glass draufhat - otherwise prefer not to try! And work with not too much pressure ... and before blowing the chip. The Lömis there at the pharmacy or at a chemist friend - is important, these are the Lömis as anhydrous as possible. At least 99.9%! Since I myself am a chemist and have done everything under a microscope, I can really recommend this simple method. An expensive cleaning by an expert can save mE.