The best way to understand the tangerine technique is to examine the section in the PhotoReading book where I talk about it and the work of Ron Davis from his book "The Gift of Dyslexia." You can do it visually, as you were trying, kinesthetically, or auditorily.
If you sit in a chair and float outside your body, as if to stand just behind you and smell the top of your head...that is a kinesthetic way. Practice standing up behind your chair...now sit down and remember the feeling of standing behind the chair. As you do this the feeling you have sitting in your chair is the experience of the tangerine. Touch the top of your head to start it; but it's the feeling in the face, in your shoulders, and breathing that indicate you are ready to read. Think of it as simple relaxed awareness that starts with a fixed point of sensation just above and behind your head. Once you've got it, go and read. No need to keep thinking about it.