I used to be like this when I was a kid so I understand where people are coming from. For something like disinfecting your own bathroom doorknobs, counters and facets (if you share it with someone) to cleaning your kitchen often, that's completely fine. For something like checking locks often, I think you should check twice and leave it alone. It should go away with age, it really should. From my experience, gaining more confidence in yourself suppresses ocd significantly too.