Bill71,
MWF is a very hard soap, and it seems that alot of the trouble people have with this is soap not loading eneough onto their brushes.
Some soak the puck in water to soften it.
I either rub the puck on my face like a shave stick, or grate the puck and use the shavings; makes life a lot eaiser

You can also add a pea sized dollop of shaving cream to the mix; this will help stabilise the lather - I use Musgo Real for a lanolin-y super-lather
Best regards
Russ