Use peppermint oil against mice
The strong aromatic smell of peppermint does not please the rodents at all. The aroma is particularly concentrated in peppermint oil.
You can make peppermint oil yourself by soaking fresh peppermint in oil in the garden for some time and sealing the bottles airtight. Alternatively, you can get the oil in health food stores or in specialist shops.
Mice control with peppermint oil
Put a few drops of the oil on cotton balls and stick them into all mouse holes.
You can also use a few drops of peppermint oil to mask other edible smells that attract mice.
Tips & Tricks
If you want to drive mice out of the garden, plant peppermint in front of the mouse holes. The plants also give off an intense smell that the mice don't like.