How do I delete all my activity history with Microsoft?

I just found out there was still activity being recorded at https://account.microsoft.com/privacy/activity-history despite me answering ‘don’t use my data’ to all the questions in the last large Windows update.

I think I turned that off now (via Windows privacy settings), but how do I batch-delete all the entries left there? There are hundreds, so deleting them one by one would be a lot of work.