Your camera and lenses can get general wear and tear as you continue to use it over time. During that time as well, new firmware updates get released that can fix specific issues with your equipment as well! Take the time to keep your camera gear maintained. Clean your contact points on your camera and lenses with a QTip & appropriate cleaning solution, check for firmware updates on your camera & lenses, and also clean out your camera bag too to clear away dirt.
It's the small things that can help to prolong your camera gear's lifespan.