Ok, so my question about WBTB is pretty simple.

What I wonder is whether it is very important to remember a dream when you wake up during the WBTB-period. Last night I woke up after about 5 hours of sleep, but I didn't remember any dreams. Then I fell asleep about 1 hour later, and had some dreams in the morning hours (non-lucid).

So for my next time, do you think I should attempt to sleep maybe 6 hours to increase my chances to wake up during REM, or doesn't it matter so I could sleep 4 hours? My fear about sleeping 6 hours or more is that I'll be too awake after that many hours of sleeping.

Thanks,
Martin