Bernard746,
It's difficult to say without looking at you, but it sounds like you're already doing all the right things. You may need to give it some more time, but in the meantime, you may need to adjust your CPAP machine in a more formal way. Adjusting it on your own randomly isn't advised. Talk to your sleep doctor - he or she may recommend a re-titration. Another option to consider is an oral appliance, assuming that you meet the criteria.
Thanks, I have an appt. tomorrow.