WARNING This script hasn't been update/used in a while and is not up to date. It's having various issues and bugs with new Twitter versions.

Twitter Timeline Cleaner

Delete all your tweets.

How to use :

1. Install Firefox or GoogleChrome/Chromimum (if you don't)
   
2. Install Greasemonkey (on Firefox) and Tampermonkey (on GoogleChrome/Chromium)
   
3. Add the script to your *monkey scripts
   
4. Visit https://twitter.com/YOUR_USER_NAME
   
5. Enable the script
   
6. Reload and wait