You should reset your device only when you want to delete all the downloaded content from the device and register yourself again for the device. When you reset your device removes all the information related to your device including parental controls, lock screen pin code, Wi-Fi settings, and Amazon account information. You can log on to www Kindle Com Support for resetting your account.
We will tell you some easy steps that will help you in resetting your device and you can take Kindle Help if misses out any of them.
Firstly, you should know that any content that you buy from Amazon gets automatically saved on Cloud. When you register yourself again for the Kindle then you can again download that content. If you encounter any trouble in that we will suggest you that you should restart your Kindle device without removing any of the personal information, Wi-Fi settings, downloaded content, and Amazon account information. If you have any content which is not saved in the content library in the Cloud, then make sure to transfer that content on your PC or laptop with the help of a USB cable. You can take help from Amazon Kindle Customer Service in case you face any difficulty in restarting your device.
By chance you forget your passcode for all your parental controls and you want to reset your Kindle device again, then you can do so by entering 111222777 as the parental control passcode. In case you forget this also, then you can take help from Amazon Kindle Support.
After that if you want to use your Kindle again, then you will need to connect to a wireless internet connection and register yourself again for Kindle. In case you need any guidance in register yourself then you can use Kindle Support.