I would like to learn how to do the "invisible increase" stitch. Elizabeth Zimmermann describes it on page 27 of "Knitting Without Tears" as does Anna Zilboorg on page 49 in "Knitting for Anarchists". I cannot seem to do it properly. My stitch is not invisible as it leaves behind a funny single slanting stitch. I cannot seem to manipulate the increase stitch when I follow EZ's diagram. Can anyone help me with this or give a link to an internet site? I've looked around but can't seem to find a place that shows how to do it.
Edit: I forgot to mention that this is the increase made by knitting into the stitch below.