So it is very important that you use, hopefully a gas stove because you can better regulate the heat of the cooking temperature. You can also leave the spurs (spines, needles) on the cactus since the boiling eventually softens them into a sting like piece of material. Therefore the spines will not be harmful. Cooking renders them soft. Now, as I mentioned above, it is important to stir the mixture while it is rejoining itself into one liquid and begins to turn green like the skin of the cactus (fig. 16).

 
Always stir and turn the heat as low as possible for the first half hour of cooking. Slowly but surely the green goop will eventually remix with the water until you have one substance in the pot. A pulpy green Kermit looking glop of goop. A quick mention that this goop of green in the pan has a consistency of glue or snot. See these next four images to show you how snotty this mixture can be (Figs. 17).

 
And the following two next images after this one to show the gooey gluey snottly composition of the green goop.

in fig. 18 i am still stirring the goop.