Going by feel, tried lower asv settings

I remember I was feeling better, sleeping better in september but I can't remember the settings. sometimes I get heavy fog from these lower settings. it seems I have less events and no clear airway events on these lower settings and the graph only spikes to about 15cm, so can I lower the max IPAP or max ps?
I'm really curious about the bpm setting, because on auto and a max ipap of 20cm I wake up not feeling great and a bit like I hadn't slept at all. maybe the high settings don't allow you to get stage 4 sleep?
my 90% EPAP is about 7cm. I am only getting 16 vibratory snore events so maybe a lower EPAP is ok for me? mostly I am getting about 45 pressure pulse events?

http://imageshack.com/a/img59/1695/42oe.png
http://imageshack.com/a/img69/4339/pe0f.png

Channel Min Med 95% Max
EPAPExpiratory Pressure (cmH20)
W-Avg: 6.60 4.00 6.90 7.90 8.20
IPAPInspiratory Pressure (cmH20)
W-Avg: 9.18 6.50 9.50 10.40 11.30
PSPressure Support (cmH20)
W-Avg: 2.58 1.90 2.60 2.90 4.20
Pat. Trig. BreathsPatient Triggered Breaths (%)
W-Avg: 98.56 71.00 100.00 100.00 100.00
Minute Vent.Minute Ventilation (L/min)
W-Avg: 9.08 7.00 9.00 13.00 21.00
Resp. RateRespiratory Rate (breaths/min)
W-Avg: 15.49 12.00 16.00 17.00 21.00
LeaksLeak Rate (L/min)
W-Avg: 0.68 0.00 0.00 3.00 3.00
SnoreSnore (unknown)
W-Avg: 0.04 0.00 0.00 0.00 1.00
Insp TimeInspiratory Time (seconds)
W-Avg: 2.18 0.20 2.20 3.00 3.86
Exp TimeExpiratory Time (seconds)
W-Avg: 1.60 0.20 1.52 2.40 3.00
Tidal VolumeTidal Volume (ml)
W-Avg: 574.11 440.00 530.00 830.00 1210.00

I remember now I have clarity with the high auto bpm settings. but I think I had more clarity in September, maybe it was the settings or supplements I took like sam-E