I have a Galaxy tablet. I want to do a factory reset, removing all info from the device and start anew. However, once I do the reset, I am prompted to enter my Google account info. Once I do this, the tablet returns with the old apps, data, etc. This is a great feature, but I want to totally wipe the thing to a clean slate. I have tried to go to my google account and remove the device, but it still shows up. Any suggestions?