Can't get clutch slave cylinder to bleed enough for proper clutch release.

[swaff]

1993 Ranger 4.0 5sp.
I have replaced the clutch master cyl. and the slave cyl. but just cannot seem to get it fully bled for proper disingagement of the clutch. Is there any special technique to get this accomplished?
I have followed the repair manual over and over but with no results. I can see thru the witness hole in the bellhousing that the slave cyl., when depressing the clutch pedal, pushes the pressure plate just slightly but not far enough.
I am totally exhausted with this-----------please, somebody help me!!!!

[swaff]

After backtracking the bleeding process, I figured it out and it work perfectly.
I took loose the master cyl. from the firewall and with all lines still attached and tilted the forward or lower end of the master cyl. up as high as I could and low and behold, I viewed air bubbles in the reservoir. Put it back together, tried it and got some better results. So, one more time, I removed the master cyl. and repeated the same as before and really got bubbles this time. Put it back together and tried again and I have the best clutch action that I've ever had. Note: I didn't have to bleed the slave cyl. again at all.
So, if anyone has ever had this problem, this will work to perfection.