I want to pull what I think are bad corks and replace them. Some bottles have been aging close to a year and others only a month. My process would be to pull the cork, then siphon loose particles from current cork off of the top of the wine (never going below the neck line), top off with similar wine, then recork. Maybe 20-30 seconds of O2 exposure on the dime sized bottle neck opening. Do I need to worry about O2 exposure on any of these bottles-older and newer? Thanks.