Having spiders or mice in your home sucks. But according to this going viral on the internet - there may be a cheap, and reasonable solution.
By brewing peppermint tea and then leaving the teabag in the room where you have seen spiders and mice, it should alleviate the issue.
According to UsefulTipsForHome.com, "If you aren’t one to brew some tea, you can get the same results with essential oil. Put 10 – 15 drops of peppermint oil in a spray bottle full of water and spray it around the baseboards. Not only does it help to keep spiders and mice away, your home is going to smell fantastic! For spiders, you can also use cinnamon and lemon oil."
Worth a shot, right?