Hi there. I have a Medela PISA that was bought in 2009. I pumped for 17 months for my twins, had a few months off and am currently pumping for my 5 month old. However, recently my pump seems to not be working very well. It will pump, draw in my nipple but once it's drawn it in, it seems to just release it really quick so my nipple 'slaps' back. Then, because it doesn't keep it drawn into the flange properly I get a ton of milk seeping out around the breast and all down my front. I have sterilized everything, taken apart the pump and cleaned it. My husband has looked it over and can find no issues. It's starting to affect my supply terribly and I am scared I will loose my supply totally if I can't figure out what it's issue is. It was working fine, no issues up until a couple of weeks ago. Will Medela help at all? I've not had the best service with them in the past, as I am in Canada and nowhere close to any of the centers that sell Medela stuff. I'm so worried. Any ideas at all?? Thank you in advance.