When it comes to cleaning the interior, there are a lot of different steps to this, and they all require different tools. As well as requiring different tools, it is also important that the correct cleaning product is used as well. One thing that is often repeated on this site (and other detailing sites), is that the least aggressive option should be used first with respect to cleaning. This is especially true with the interior.
Below, there are links for the various interior cleaning regimens that should be followed, as well as the various cleaners and protectants which should be used in to bring about and maintain the finish.
As always, it is the case that some cleaners are classed as multi cleaners, whereas some have one, main function, such as leather treatments.