Simple... heres what you need...
- Scotch Brite Pads (like the ones you use for dishes)
- Any kind of all purpose cleaner (i suggest a concentrate and water down as directed on bottle)
- clean rags
- armor all
First, spray the all purpose on the area in need of cleaning. Then scrub gently with the scotch pad. Be careful not to scrub too hard, or to the point where you start to remove the finish. You only need a small amount of pressure. You will see the dirt and stains start to leave streak marks. Wipe clean with a clean rag. I use microfibers cause they hold water and dirt well with out leaving lint. Repeat as needed.
Once area is clean, spray on the armor all and wipe off. Or spray onto a clean rag and wipe down the interior. Armor all treat and protect the surfaces.
DO NOT, waste your money on the special leather/vinyl/interior cleaners. They are bullshit and don't work as well as regular old all purpose cleaner.