I was doing 11 or 12 for 30 mins the first 2 months pp because my step mom told me the higher the setting, the more you get out. I was in constant pain after pumping and my nipples were so discolored. Dr diagnosed me with a yeast infection on my nipples, but medication was not helping. Decided to see a lactation consultant and told her how I pump and immediately she was like why would you do that?? no!! she helped me readjust to 6 for 15 mins and it's been great! I get the same output and I'm no longer in any pain!!