I've started using my Ti-Nspire Cas touch again now that school has started, but now when I pick it the batteries are slightly loose and jiggle around a bit, which occasionally causes my calculator to go into a short loop of turning on and off until I take out the keypad and move the batteries around again. Also on occasion buttons on my calculator won't work, such as the control button and my touchpad (both when clicking and moving). Does anyone have any suggestions to fix either of these?

That did fix the bouncing problem, but it still turns off randomly and keys are still unresponsive, the hooks (or whatever you want to call them) appear to be slightly bent out of shape (im not sure though, ill have to compare it with another touch tomorrow) so that might be making it lose contact with the screen...

Probably not, its 3 years old. It seems to work fine if I push the release thing to take off the keypad but keep the keypad in