Uncleared old deposits in bank rec area

How do I clear those old deposits sitting in the bank area. Bank reconciled by plugging in difference. Dr bank cr sales as amount of deposit in bank and Amountss entered by daily sales sheet in books dont match at times. Please also advise if this is the correct way to plug diff or should o credit a clearing account? Question 2 how to get rid of those o/a deposits from there? And Q3 how is the clearing account cleared or zeroed out .. thank you to anyone who can help