I have heated up the iOpener to 165 degrees and left it on for more than a minute. No way I can lift the screen off with the exact knife. Tried different angles in various places, but no go. I also used a hair dryer un til the watch screen was too hot to touch and even tried a very hard cutting tool blade and also no go. Could n ever get the blade under the face I applied enough force where I could see that the blade left small marks, not very big, but could never get anything to move or lift. What am I doing wrong? I spent 47 years at a global computer company and I am used to taking apart small things and applying force when required. I don’t know what I am doing wrong. Please help me.