I did exactly this a while ago (before deleting my Twitter account for good) and with the id extracted from the downloaded CSV I could delete everything. Perhap

I did exactly this a while ago (before deleting my Twitter account for good) and with the id extracted from the downloaded CSV I could delete everything. Perhaps they've changed policies recently. I wrote a couple of Python scripts to keep your timeline tidy (delete everything from the beginning, then trim and leave only the last N): https://github.com/rinze/obliterate_tweets https://github.com/rinze/obliterate_tweets