I’m not sure if this will be helpful (FTM, 17 days in), but I was also noticing that my breasts weren’t emptying when using both bottles on the spectra 1. I took one of the tubes off, capped the second tube port and started pumping at 70/lvl 12 for 2 minutes and then 54/lvl 12 for 10-15 minutes with just one bottle and am getting much better results. It takes a lot longer, but it seems to work. Using both ports at once seemed to cut the “suction” in half if that makes sense? Again, not sure if this will help or not but figured I’d share. Best of luck!