Issue with Laptop Keyboard

I'm having an issue with the keyboard for my Toshiba Satellite P775-S7320. Put plainly, keys have started triggering other keys, as if both keys were pressed at the same time. Nothing was spilled on the keyboard, but now, A and Tilde trigger one another, and the same for 1 and 2, Q and S, W and Tab, X and Capslock. The only exception to this is Z and \. Z will trigger \, but \ will not trigger Z. I've popped off the keys and cleaned them with compressed air, I've rebooted my computer several times, and am unsure of where to go from here.