No need to rinse the soap container. I don't leave any leftover lather in there. If you do rinse, it will definitely decrease the life of your soap (whether that's a good thing or a bad thing is the subject of much debate).
When loading the brush, you generate a little extra proto-lather? Scoop it out with your index finger and add it to your brush. Voila! No "leftover lather." If you're generating too much "extra lather" to scoop up and add to the brush, I'm gonna say that you started with a brush that was too wet. You should start with just enough water in the brush to emulsify the soap to get the amount of soap you need to make lather for your shave. There's no need to make enough lather for 10 shaves every day of the week.
I allow my soap to airdry outside the bathroom while I'm at work. When I get home from work I put the lid back on and store it away until the next use.
Last edited by kingfisher; 05-21-2012 at 10:27 AM.
Randall. BOTOC, Excalibur, Hot Sauce Pepper Heads Club