How do you keep the lather hot (or at least warm) for multiple passes?
My technique so far has been to heat some water to boiling in the microwave and while showering let my brush soak in some, put some in my soap mug, and set the soap mug in the rest...so everything gets nice and warm.
The problem is while the first lather application is nice and hot by the time I get around to the second pass I'm shaving with cold lather...and due to the combination of my having an extremely tough beard and being REAL careful now that I've discovered how to make my razors scary sharp I normally apply lather several times during the shave.
The soap I'm using (Trumpers) takes a lot of swirling to get the lather to the right consistency and by the time it's like whipped cream there's probably enough for 5 or 6 passes.
I hate to waste all that lather by rinsing it all out of the brush and starting over so I'm wondering if there's some super secret Zen Shaving Guru method of keeping it warm for more than 10 or 15 minutes.