iPad volume keeps rising all by itself
According to this apple support discussion:


  I understand that the volume controls on your iPhone are not working
  properly, and I'm happy to help. You can follow these instructions,
  and contact Apple Support if you still need assistance. 
  
  If the volume buttons, Ring/Silent switch, or Side Switch doesn't work
  On an iPhone, the volume buttons and Ring/Silent switch are on the
  left side of the device. The buttons on other iPhone models are
  similar. On an iPad, the volume buttons and Side Switch are on the
  right side of the device. If any of these buttons or switches don't
  work, follow these steps. After each step, see if you still need help:
  Unlock your device. Some buttons don't work from the Lock screen.
  Check for debris or dirt around the button or switch and clean with a
  soft cloth. Remove all protective films and cases that might interfere
  with the button or switch.