Mites = Not Much Moisture.
Save yourself a lot of headache and just bury the food, whatever it is. The worms will find it and the other critters won't. KISS method works.

Thats odd, everything I have ever read said Mites are commonly associated with too much moisture. And I have never heard of anyone saying to bury grains, I've heard not to becuase it will heat up the bedding and kill your worms. One of the papers I have that I use for my worms from North Carolina State says too much water is a reason for a mite problem.

As you wish.

Pretty sure mites occur in a moist environment.

I'm with steamyb on burying. Depending on how large a surface area your bin has I think that burying in a corner would allow your worms to escape from any excess heat.

Do you only feed this oatmeal mix? I don't blend food because of the extra water you need to add in order to blend it up but a lot of people do. Maybe try blending it up dry and sprinkling it on top if your bin is too wet.

I do blend it up dry and sprinkle it on top, it does absorb some water into it as the worms eat it.

My understanding is that you can never get rid of those white mites completely. Keeping your bin from getting overly wet or burying the food can keep the population from exploding.

In the end they are part of the decomposition process. In my bin they tend to get to the fruit and vegetable scraps that I put on the surface before the worms do but they get the decomp process going and my worms finish it off. They also appear first on the dry shredded cardboard I put on top of everything as it starts to absorb moisture. After the mites start to go to work on the wet parts the worms start to move in. I think I've read that the mite's feces also add to the microbes working on compost as well.

Not scientific analysis, just my observation of what I believe to be happening. As steamyb says, keep it simple. Figure out what are good conditions, what are bad conditions and try to keep within that range but remember there is a wide margin for error. These critters all do well left alone in nature.