the way i feel now..

Many a time .. i tried to tell him how should things be done.. n every time is a 'OK'.. but in the end is still the same.. how . is it really true that if you cannot change a person then dun bother to.. the standard of every one are different.. so even if you have a higher standard.. that does not mean you should expect the same standard from them..
but.. what should i do then.. to close one eye n pretend every thing is ok??!!
i really dunno.. getting really tired of reminding him.. n also dun feel good about it.. having to keep an eye on some one my senior.. i really dun want to keep telling him off.. but .. is just that all the things he do are all not right to me..
is like when things are to be done the proper way he will do it the short cut way.. but when things can be done in just one simple step.. he did it in a longer way..
i want to do so much more.. i feel like just do my stuff n dun care about how he is going to get his things done.. but i just cannot do that.. i have a very bad habit.. if i see things not right.. i just cannot stand it.. ( wish that i am not there to see how the things are done..)
can i really just close one eye.. n carry on with my job.. then when he is not around.. go n help him clean every n put every thing in order!!! HOW??