And is your lather wet or dry?
Is it filled with bubbles or is it creamy?
I find if I can hold my bowl upside-down and my lather doesn't move it's thick enough. Or even better if I can stand my brush up straight in my lather it's thick enough. I then will pull my brush out an if the later on te brush looks like whipped cream then I'm ready to go.
However, while shaving, if I have completed 1 half and the other have is dry, then I have not created a good enough lather.
Sorry if these thoughts are a bit scattered... I'm pre-coffee right now
