How long are you staying awake during your WBTB? As a general rule, if you fall asleep unconsciously than you should stay awake longer. If you can't fall asleep at all you should stay awake for a shorter period. Also how many hours do you sleep in a normal night? I normally can't WILD until after ~7hours of sleep, but I get over 10hrs a night. Have you ever meditated? Meditation is extremely beneficial to WILDs and maintaining focus on your anchor.