Try these "natural killers" between cleanses...
Pin worms are not microscopic, and can easily be seen. They are small, and it looks like a little white thread about a 1/4th of a inch long.
They love refined sugar, and cause sugar urges. Don't eat it or anything that has it in it.
If I were you I would order the Humaworm (It's a great product) but meantime do some other worm killing things... like Black walnut tincture, wormwood capsules, ground lemon seeds, oil of oregano, eat a whole squash, eat a whole fresh pineapple.
Garlic and onion are great natural killers.
Add spices to your food... like 1/2 tsp cinnamon in oatmeal or allspice and add sage, thyme, cummin, oregano, cayanne pepper to stir frys or soups and stews - everything you can... spices do much more than flavor food.
There are many more things that kill worms. These are just a few that I can think of off the top of my head.