having recently bought it I am now thinking that I may have purchased a faulty product. This pump tends to gather some milk in and under the silicone diaphragm. I know there is no problem with the way I put all bits together - have checked with others too. Initially I bought the manual pump which was time consuming but at least it was collecting all the milk I was expressing where it should. I spent almost £90 for the electric one so I am not happy of loosing valuable milk through faulty parts. Does anyone use this pump and what are your experiences? Is it natural that some milk will be collected around the silicone diaphragm or have I bought a faulty product? I intend to call the Avent people as well but wanted to check here first.