Digital BW, The Print

As long as we're on the subject of getting an Epson 4880 up and running again…

Are there good online instructions for cleaning 4880 heads?   I knew all the tricks for smaller machines like the 2200, but I've never had a problem with the 4880 before, so I'm a cleaning novice.

If it matters:  it is possible that one or two cartridges ran out of ink.  I am using OVI inks in MIS opaque (bag) cartridges, so ink might have gone too low without my realizing it.  *If* that happens, are you supposed to do anything special, or will the printer know enough to re-prime itself? 

Thanks.

Myron