TwitWipe is a service developed by Aalam Ghaag, allows users to delete all their previously posted tweets, all at once.
The service deletes all tweets but keeps followers, favorites, apps and everything else intact.
For using the service, first login to your Twitter account through TwitWipe, then you’ll see the ‘Start Wiping’ button. Once you click this, you’ll be asked for confirmation. Go ahead and your all tweets will start flushing.
The negative point of the TwitWipe service is the time it takes in wiping the tweets.
When one of my friend deleted his tweets, some 260 in numbers, it took him as long as 55mts to get the job done.
This is due to the large number of people using the service simultaneously.