That takes too long. Just pee on the grain and the bugs will scatter away.
You eat bugs every time you eat just about any grain product… or in fact most veggies.
But if you call the company hotline, they will likely send you a free box, which I think is fair.
It said “natural flavors” right on the list of ingredients. What did you think they meant?
If anyone is curious, I think that this is the document that was supposed to be linked is here: Food Action Levels - Levels of natural or unavoidable defects in foods that present no health hazards for humans