When lathering Castle Forbes I will smear a snurdles worth on the bottom of my lather bowl, too. If you don't you'll end up chasing that little dollop of cream around the bowl with your brush. For comparisons sake think of cracking an egg and trying to pick out a tiny piece of egg shell out of the raw contents.

And as other members have noted, CF likes water. So when you think you've added enough water then add some more.