I exclusively pump. I'm ready to stop and switch to formula and have been gradually dropping sessions to dry up my milk supply. I used to do 15 minute pumping sessions but now that I am down to 4 pumps a day, I seem to never be done at 15 minutes. There is always A LOT still coming out. Question: should I still stop at 15 minutes or just pump until I'm empty??? Again the goal is to stop pumping but I don't want clogged ducts.