Tow is some tough stuff and can stand up to a good bbl scrubbing. When you抮e done scouring just rinse the black crud off the tow and it抯 ready to go for the next cleaning session. A little will last you a long while. I never found hot water to be better than cool water for cleaning though some argue hot water evaporates quicker to lesson chance of rust but I can抰 see much difference.
My opinion from hysterical, I mean historical research is to keep her well greased over spotlessly clean. We can indulge in the cleanliness boot camp inspection when we get home to or 21st century life.
Not a WD40 fan but I do loves Ballistol, I surely do.
Others mileage may vary