Moving Culture To Soil Enclosure - How to Prevent Mites?

Hi all! I bought some cool plastic cubes that are 4x4x4:

https://preview.redd.it/hgm5bfb9hmhe1.jpg?width=1500&format=pjpg&auto=webp&s=21531c180792a106633cf6781c7a6f680d925f28

The lids seal nicely so I think they could work good as a pretty enclosure for my springtails. I am considering using soil substrate (they're currently on clay). If I bake the soil before use, will that be enough to kill off any potential mites before moving my springtails over? I've read that freezing won't kill off mites.