Thank you CHfather, The energy drink effect on me has been a godsend. Cluster manifested last night and the trick seemed to work again as an abortive. Within 10 minutes I was back to sleep. Yes. I will stop daytime caffeine to preserve effectiveness and Thank you, will look into the 5 hour energy especially if there is waining effectiveness. Re. Oxygen I am convinced I must be doing it wrong in some way and am going to give it another try, but will watch Bill Mingus's oxygen breathing techniques and get the Clustermask as well.