Recently, my lucid count has passed 15. And with each and every one, I seem to get more frustrated that none of these last more than 15 seconds! I've long passed the phase where I get extremely excited upon becoming lucid, so that is not the cause for my waking up. Frankly, I'm at a loss, so I'm asking for help.
When I become lucid, everything appears fine. The dream does not instantly respond. Yet, after about 15 seconds, either of these happens:
1) The End
The most common ending which can only be described as simply 'the end'. The dream stops. There's no warning signs (but it's no abrupt ending), but at a certain point it just seems as if the dream has reached it's natural end. I'm not aware of the dream ending while in it, I'll just wake up at one point and realize that there was nothing beyond those 15 seconds.
2) The Collapse
This happened to me only twice. My field of vision moves away from me, becoming smaller, seems to crumble and become blurry, and at a certain point it looks like I'm watching at a broken TV instead of being in a dream. This ending actually takes a while, and while I've never been, I suppose I can be conscious of it.
3) The Excuse
This happened once, during my most vivid dream ever. It was all so crystal-clear and seemed so real. Apparently, it was too strong to just end, so it needed an excuse. I was walking down the stairs, and on the second floor my parents suddenly come bursting through the door, lunging at me, saying things like "Don't do it!" and "Don't leave!". They grab me, and as I try to free myself from the struggle, the dream loses it's clarity and I wake up. This was not a nightmare, as there was absolutely no scare involved.
I've tried rubbing my hands, it increases my dream realism, but does nothing about the 15-second problem. Spinning does not work either, as I usually can't sense when the dream ends. I've tried stimulating all senses, which resulted in a dream which lasted 5 seconds longer then I would have expected.
Any help would be greatly appriciated, as I'm one frustrated LD'er right now. :(