Note - There's no need to open the cartridge, I'm just using this picture as an example:
If you're having connectivity issues, such as hangs, or getting bad dumps, you should clean your contacts.
The golden pins you see when you look below, or to the back, of your cart.
Doesn't matter what device you're using, if it uses a cartridge system then it usually has exposed or semi-exposed pins.
Use a little bit of cleaning isopropyl alcohol (IPA) to clean it, with something soft, like a cotton bud. Don't use your breath or water, and don't scratch them.
Only place them back into the main system after the IPA is thoroughly dry.