So here's how you do it the easiest without causing sores or blisters. First build up the frequency, meaning that you do enough short sessions that the swelling wont completely go down during the day. Of course when ever you have the time for it.
I recommend doing 3-5 sessions per day with few hour intervals. Awesome when ever you have a lazy day at home and nothing to hurry about. So start by doing 15-25 minutes per session or so, then add five minutes to each session once a week. Take one or two days a week completely off, for example Wednesday and Sunday or Monday and Thursday.
Always keep the pressure at optimal or a bit lower. I've started doing lower than optimal since I got the XXXL domes as these things are very challenging to tame. Optimal pressure on Noogleberry gauge is with the needle facing rigth, that's approximately -5 inHg (Black) or -0,2 bar (red) so going one or two nothces lower than that will guarantee you're not hurting your girls.
First build up frequency to keep the swelling going, then build up time, I would say the most optimally effective total time is 3-5 hours a day, but less will also give you results. I'm seeing massive changes using the new domes doing only 2-3 hours a day. Then lastly you can build up the pressure, but NEVER exceed the optimal, just don't do it! It would give better swelling but it will also cause damage which shows as tiny blood blisters, sore spots with broken skin, long lasting dome edge marks and worst of all, very long lasting discolouration. I've had these all and have some right now so I know what not to do. Right now I'm slowly healing from all this while keeping the program going, being much more gentle with the new domes has been the key.
Pain is your friend, docomfort is normal and to be expected, but actual pain is your body telling you that its too much, you're overdoing it and should take a break, lower the pressure or do shorter sessions. Never ignore the pain, its your body telling you that you have reached the limits. Don't feel bad for stepping back with session duration if its too tough, Noogling has a learning curve and slowly building the tolerance is essential for making it work.
Oh wow, this turned out to be almost like a quick guide to Noogling.