Two things I have found may help others. Worm eggs live inside the cannabis seeds. They will sometimes emerge in the seed container, but will die without moisture. So inspecting seed containers gives you an idea about possible infestation. Secondly, submersing the seeds into a cup of water to germinate may be a better choice than soaking in a paper towel, because the worms can't easily be seen in paper towels. In a water bath the worms emerge into the water and drownd.

Also, I believe one species of these larva is house fly's. So keep the wing critters down. And finally, "dead" seeds may not germinate because they have eggs implanted in them. So flush all dead seeds to prevent infestation, from late emerging eggs.