Hello, I have tried everything on how to hard reset my K10 Dragon touch. I have like 20 of them from a few years ago during COVID when we used the. At my bar. Every time I go in , it's asks for previous email user and I forget what I used back then cause I did not want my email in there when customers are using the tablets. I have pressed power and volume up and held and no reset there. Then I saw a video with no volume or text with you can't see his fingers , the video is worthless. But one he got passed the first volume up and powered and pressed the first line which is reset I think or something , a green image of some object popped up and he pressed some buttons and got into the spot to do the hard reset. Any help,? Ty