grim topic of cleaning interior

Hello together, the topic car care has already been mentioned here several times – but mostly the topic of the “outside skin” … therefore the question (allowed) how it “goes” with you inside – is important on the outside and only secondary (if I have ́mal lust & time) – if necessary – or very important, since I don ́t belong to the “outside hui & inside pfui” – generation – ….?? and – how do you clean everything? all at once or only one part – and only once in a while full program? – and above all, HOW CAN MAN AFTER GERING – so to speak – get the interior again somewhat “on front man”? because if I have the whole vehicle from the outside again top, I usually no longer have a desire to join a complex cleaning of the interior! who these my questions “nerve” should just read the next fred!