My combs always break so I've got this little bitty piece of a comb. Not shown: optional wax styling products.
Separate the hair that you want to dread. I recommend a 1 inch by 1 inch piece. If you're doing a full head of dreads, you want the sectioning to be pretty uniform.
Use hair bands and hair clips to secure the rest of your hair out of the way.
Apparently you don't have to have very dirty hair if you use a product like this. I would still advise that you skip a few washes and braid your section of hair the night before.
It's okay if you have little tendrils left over. Just wrap them around your little ball of back combed hair or palm-roll them in.
My ghetto crochet hook that doesn't work
My make-shift crochet hook doesn't work, but the process is still the same. Your crochet hook should be pulling the hairs into your dread and tightening it up.
A quick note about dreads. Also, I'm very sorry mine didn't turn out right today, but trust me -- this is the correct process. You just need proper tools.