They are RIGHT, let the acetone do the work. It did need more than a few drops, but not much more. Wait 3 min, apply again. Wait 3 min again. Then take the card and aim the point of the card toward the middle of the adhesive. Wiggle wiggle wiggle moderate pressure. It will penetrate the first strip and then work it left and right. Repeat for the next two strips.

Kevin is correct. Use the plastic card. Lift the cable to about 45 degrees and the card to maybe 10 degrees. GENTLY pull up ribbon while wiggling the card left and right while simultaneously pushing under the cable. GENTLY!

Why does the guide suggest purchasing the "MacBook Pro 13" Retina (A1708, A2159) Display Cable "

I have done these before and yes, using a soldering iron to melt the plastic rivets is a good method.