spectra s2

Does anyone else have this pump? I have been loving it so far. LO is 6 weeks old and the pump has been working great. Except this last pump I got way less then I normally do. I had cleaned my parts earlier today so I don't know if I didn't get something tight enough? If you have this pump have you lost any suction? How did you fix it? It deffinately didn't feel like it was pumping as hard as it usually does. (Also I only pump 1-2 times per day to build a stash).