This is a quick one but as I was looking too hard for a Twitter app that would delete all the Tweets I wanted to share with you the only one I have found that seems to work. It is Twitwipe.
You may be asking why I don’t delete the Tweets individually but there are 22,000 of them in a different account. Using Twitwipe it will take about an hour due to the restrictions on the Twitter API usage.
You may also be asking why you should delete them. For my purpose it is because I want to use an account for a different purpose than the thousands of Tweets suggest though other valid reasons may be for personal privacy or just embarrassment.
There should be an option in Twitter for you to do this but no. Be careful though as it will delete ALL your Tweets, there is no option to choose or filter.