Mentor him. "In this section of code, you can do this and it looks cleaner." It sounds like most of the problem is that he is short on experience and does not k

Mentor him. "In this section of code, you can do this and it looks cleaner." It sounds like most of the problem is that he is short on experience and does not know how to be a good programmer, so be the best example of a good programmer and teammate that you can. Teach him a few things and he might look up to you and start picking up your habits. Make sure he knows how to debug so that you can tell him about a bug in his software and he can fix it so you don't have to.