Duplicate contacts seem like a minor annoyance. So what if you have two entries for the same person? It's not that big a deal, right? Wrong. The hidden cost of duplicate contacts is bigger than most people realize. The productivity cost: Every time you search for a contact and see three entries, you waste 5-10 seconds deciding which one to use. Over a year, with hundreds of searches, that adds up to real time. The embarrassment cost: You text the wrong number. You call an old version of a contact. You accidentally email the wrong address. The sync cost: When contacts are duplicated across accounts, syncing creates a mess. Updates don't propagate correctly. You end up with outdated information. The organization cost: A cluttered address book makes it harder to find the people you actually need. The fix is simple: use a phone cleaner that includes contact management features. These tools scan your entire address book using fuzzy matching to find duplicates, then let you merge them in batches.…