Very few mouse commercial repellants use some plant-based extracts – such as peppermint, spearmint, cinnamon, or essential oils- to get rid of mice.
While these are non-toxic, customer reviews claim that do not work at all, are inconsistent, and sometime even increase the number of mice.
Other commercial repellants use synthetic compounds to mimic a very strong, unpleasant garlic-like odor. In granules, or liquid, or powders, they must be reapplied weekly.
According to researchers, most of the time do not work at all.