How to Clean the Penis for an Uncircumcised Baby

I had a baby boy 7 months ago (our third) and we didn't get him circumcised. My question is, what so we need to know for teaching him about proper care when he gets older? I have looked it up and there is lots of info that contradicts each other? does he need to pull back the skin to clean it or not? Any other info about this issue would be great!!!