Cleaning Top of Pinhole

Reprinted from "INSULATORS - Crown Jewels of the Wire", April 1971, page 22

I have a hard time cleaning the top of the threaded hole in all insulators, threaded or not. 
This is what you need: 
1 toothbrush,
1 heater and 
1 pair of pliers.                                                                                                                                                          

	Bristles-------
Apply heat here (2nd row from top)

Then, after heating second row of bristles, take pliers and bend back about 90 degrees. Let cool and use.