err what is wbtb?
WBTB = Wake Back To Bed Method
It is a method where you sleep for 6 hours then wake up for 30 minutes doing something like MILD then go back to bed and try to have a LD from there.
It’s one of the best methods out there. 
Try it out my friend. 
Best method ever.
Next time, use the search-function:
slagt.net/ld4all/search.php
You will find almost anything by doing a search!