whats up with this?

[beo]

I commonly use bubble intro as an introduction and to practice with. I go very deep(to the point where I "black out") in the first part but I almost always come back to conciseness as the same point about a min form the end. then my face starts to ich something awful until i scratch it and at that point Im out of trance and not ready for the next file
What causes this? I have taken the awakener out of bubble, but I still come out of it at the same spot even if my face doesn't ich. so the long and short of it is; what can I do to keep that deep trance the whole way through?