How to remove your saved WiFi passwords from Amazon?
To delete Wi-Fi passwords saved to Amazon using your web browser:
Go to Manage Your Content and Devices
Click the Preferences tab.
Under Saved Wi-Fi Passwords, click Delete.
To delete Wi-Fi passwords saved to Amazon from your compatible Kindle e-reader:
Tap the Menu icon from the Home screen, and then tap Settings.
Tap Device Options, and then tap Advanced Options.
Tap Delete Saved Wi-Fi Passwords, and then tap Delete to confirm.
Better to be safe than sorry anons!