So as the title suggests, Id like to know how to service and clean my machine properly to extend the life, and produce better shots.

Ive pulled the shower screen off and cleaned all that, along with the portafiller. The exterior is no worried, but what else do I need to do?

How much cleaning of the group head should I be doing, and how?

Descale, back flush? All pretty foreign terms to me at the moment and I couldnt find anything relating to this machine online about cleaning and servicing. Any help or links would be fantastic :)

Replacing seals, that sort of stuff. How? What ones? Whee from?