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Q: How do I forget the Duo setting to Remember My Device for 30 Days?
The setting is stored as a cookie named api-nnnnnnnn.duosecurity.com1 or duosecurity.com. Find and delete the cookie in your browser. Upon next launch of a Duo-enabled site, you will be prompted to authenticate with Duo.
For browser-specific instructions on how to access its saved cookies, please see: