I posted this question in the DS section and no one helped me, so I am posting it here.
My friend recently gave me his unwanted copy of Mario Kart DS which has been sleeping in his basement for years.
The cartridge works perfectly, but everything other than the inserts is dirty, so I'm thinking of cleaning them.
For the plastic box, I'm thinking of removing all papers, soaking it in water then rinse it, but I need more careful ways of cleaning the cartridge since it has electronic parts inside.
All suggestions and helps are welcomed. 