How much buildup is there on the inside?
Typically its recommended to use some mild chemicals like PBW and hot water, followed by a light citric rinse if you are looking for that shine, however with copper there is such a thing as "too much" cleaning with acids as they will eventually eat away the copper.
In terms of the condensers, you can soak them by capping the bottom inlets/outlet and filling from the top. Usually for most clients I recommend a light cleaning between spirit types, or when you can notice the effectiveness of the copper starting to fade. If going to lets say a vodka from a Gin, it would be recommended to do a more thorough cleaning to get rid of the oils from the gin run, but even then, most of the time a 140 degree PBW will clean it out pretty well.