I had trouble for the longest time, providing great humor to the wife.
I took one set of lines into the office so I could try in silence one morning and found I had everything, but forgotten the tape. I used some packing tape (clear, much stiffer) and found that was the problem.
I make the taper (about 2")
tape it tight"
and tear into it... no problems.
If I try and do one taping the taper with regular house tape - its a complete mess. No fid, no wire, just the right tape.