Spectra S1 tips and tricks

I’m 6 months pp and started exclusively pumping around 4 months when my baby decided he hates breastfeeding. I still don’t feel like I’m getting the most out of my Spectra. I’m using the correct flange size but my output per breast is about 1-2 oz for a total of 9-11 oz per day.

Is there anything that I can do to really maximize how my Spectra works? My SIL told me that the suction decreases if any moisture gets in the discs so I make sure to wipe them down when I remember but when I forget to I don’t see much of a noticeable difference. Is there anything else I can do?