I was reading the Sept. 2010 issue of Threads magazine and on page 77 there's a section on machine maintenence. In addition to cleaning, oiling (some machines), near the end of the page it also goes into power surge protectors, unplugging machine during thunderstoms etc.
I already knew these steps so far.
Then I read "...You may disconnect the cord at the outlet or at the machine. If you disconnect at the machine and leave the other end of the cord plugged into the outlet, do not leave the cord touching the machine."
Really? I do that all the time.
They didn't explain why, but I assume the electrical surge from a storm could still affect the machine software?
I just thought I'd pass this on to everyone.