3ds XL cartridge slot leaves black marks on cartridges?

#11PlaysaverPosted 1/5/2013 10:58:42 PM
3ds carts are white. It's probibly doing that to black ds carts as well. Probibly where the black comes from in some cases.
#12AllaudeenPosted 1/6/2013 7:57:59 PM
It left a black mark on my Kid Icarus Catridge, dunno what caused it though