Have you plateaued in strength or muscle gains? Have you been working on your grip strength? If not, then that may be a simple solution to your problem.
Think about this, 500 years ago, instead of lifting weights, you would have been throwing bags of grain, fire wood and lifting other heavy objects with your hands. Your hands would have almost always been the link between you and whatever you were moving.
So in today’s world, we have designed everything to take a weak grip out of the equation. The downside of this is that your nervous system controls everything. And since your hands should be the link to everything you move, if they are weak, your body will effectively put a force/mass governor on all those big strong muscles to keep you from injuring something in your hands or forearms (i.e. Elbow/forearm tendonitis). For this reason, grip strength has a high correlation with disability later in life.
There is a simple solution to this problem, make your grip harder. For around $40 you can purchase a set of Fat Gripz from www.fatgripz.com that will adapt to any tradition barbell or dumbbell (or chin-up bar). Use these for all warm-ups and then at the end of your workout, choose a holding exercise to failure with the Fat Gripz. For example, try hanging from the chin-up bar as long as you can. When you can hold for 1 minute, add some weight. They are simple, durable and cheap. From a gains standpoint, it will be the best 40 bucks that you will ever spend.