dont know the solution but some tips to prolong the life of these parts.
avoid dry steering, try to maximize use of steering such that it is really soft to use, like moving a lil if completely stopped, avoid hard acceleration and steering at same time, correctly inflated tyres, balanced and aligned wheels etc.
if steering makes a sudden movement it self because of bad road(transmitted from tyres to all the way to ur arms through steering) correct ur course such that u use minimum force because u r at mechanical advantage behind the wheel, if u have to fight a force with some muscle then try to imagine its magnitude at the other end of steering assembly.