Objective: How do you know if you should clean your video game cartridge?

Which of the following solutions is more sound in terms of naive physics reasoning?

Choose from: A. if you open up the cartridge and there is a lot of visible dust, or if your video game is not playing then you should probably clean it.. B. It a lot of time has passed since you have cleaned your video game, or if you have handled it a lot then you should probably consider cleaning it..
A.