pretty sure its not leather, but i also use tuff stuff, for over 10 years now, its good stuff for sure.
spray it on, let it sit, then work it in with a damp rag, then rinse the rag and wipe it off, rinse the rag repeat till its all cleaned off. i use a pail of clean water, dunk the rag, ring it out, out side of the clean water. (so the water stays fairly clean) warm water works best.
then use your favorite protect-ant. armor all or what ever, or leather conditioner for the seats.
in between full clean ups ill shoot the dashboard with windex and wipe it down, windshield to the floor. and the doors.