I've been working out of my apartment lately and I've taken a couple quick power naps in the afternoon, around 3 or 4pm for about 30-60mins. I've noticed that my HI is superb in the afternoon. It seems that the light coming in from the window helps my visualization. At one point it was strong enough that it looked real. The only problem is, even after focusing intently on the images, I never fell into lucidity.

I concentrated on my breathing and then on the images. I achieved a little numbness, but never got to the falling. When I felt myself getting closer and closer to almost falling asleep, I would wake up for no apparent reason. I think I may have been getting excited(?) I felt my eyelids trying to open on their own but I always managed to keep them shut. I think the only thing that really hurt me were those moments where I would "wake-up". How can I get around those? If I can contunually become more relaxed, those wakeups shouldn't happen anymore right?