Unless you are very familiar with assembly and disassembly of the decocking mechanism, I would not go any further than "field stripping". These guns have their own special set of instructions for repair and disassembly, and speaking from experience, they are a bear to get back together properly.
If you are mainly concerned with cleaning the internals, and there are no repair issues, this is one instance where I would strongly recommend using a flushing compound like Guns Scrubber or non-chlorinated carb spray, and then a light re-lubrication after blowing dry.