Madela freestyle users....

Is there a trick to the pump??
I borrowed my friends bc I'm traveling for work (at home I use the pump in style). The freestyle does not seem as strong and I'm having trouble expressing milk. I'm pretty sure part of it is that my supply is dropping being away from dd and not pumping as often as usual but today I pumped and barely got 2 ounces from one breast yet I squeezed it (without the pump on) and got milk squirting out - like a lot (sorry tmi).
Am I doing something wrong with the pump?

Madela freestyle users....

Make sure the parts are completely dry and make sure the yellow part is totally flat. I have a freestyle and a pump in style but I have only used the freestyle so I can't compare. I am going to try it tomorrow and let you know if I can shed any more light. Are you using a hands free pumping bra?