Well, I had my second brew day today and ...Any great suggestions on how to clean this thing out?
This is how I do it, still looks like new.
I rinse the inside around with a hose, use a soft sponge to wipe sides and bottom, I do this quickly 2-3 times throwing out the water. After this sides and bottom should look clean. Then I cover the bottom with a little water, and using a thin kitchen rag, wipe behind the elements to make them spanking shiny. Rinse off.
I turn BM upside down and with a wet cloth wipe it, also the control unit, not too wet though, to get any sticky wort stains off.
Open the pump, take off (and put in later) the parts very carefully, be very gentle with the pin sticking out, with a cloth wipe off any grains etc, rinse and wipe the rotor and ring. Let it open overnight so any moisture will dry out. I left it once closed with moisture in and got the tiniest rust speck...
Every now and then I run starsan through the pump manually, but during the clean up no chemicals and such are really needed. Just water and a soft sponge/towel to avoid any scratches.
Before brewing I then freshen up insides with a damp soft towel. When you ventilate the pump you may see some grains, so if you want you can ventilate already after cleaning. But leave the pump open overnight.