With so many Power steering pumps complains I guess its good idea to replace power steering fluid - ATF
Easy and a really good method to do it is just to syringe *Walmart has nice ones with small hose for 3$
Suck Fluid from reservoir add new one .. to max line .. ( use only good ATF like Amsoil or any other good brand )
I Use AMSOIL Synthetic one .. for obvious reason ...
Its good to do it couple times .. Car needs to be driven between changes so fluid mixes ..
I saw big improvement in winter time with Synthethic ATF
I guess Couple dollar for bottle is good insurance.
2nd method is to disconnect line .. its more complicated and I would not recommend it ... Gettin Air in the system can be a potential problem.