Why Peppermint Spray Didn't Work Either And What's Actually Different
Before I found the right solution, I'd already tried peppermint oil.
Most people in my situation have. You soak cotton balls, you place them around entry points. Your house smells pleasant for a day. The mice don't care.
Here's why: most peppermint oil products contain less than 1% concentration. It evaporates in hours. And at that level, it's a mild annoyance to a mouse not a deterrent.
What I discovered was that the concentration is everything.
I came across PestLab Rodent Repellent Pouches through a forum thread. What caught my attention wasn't the peppermint claim I'd heard that before. It was the mechanism they described.
Two things working at once:
First: Peppermint oil at 40% concentration in a slow-release carrier.
At that level, it doesn't just smell bad. It directly fires the trigeminal nerve in mice the hardwired danger-detection system. Their brain receives an involuntary threat signal every time they get close. They can't get used to it. They can't learn around it. It's not a behavioral response. It's a nerve response.
Second: Active cinnamon oil that chemically disrupts pheromone trails.
This is the part that solved my actual problem. The cinnamon oil doesn't just mask the trail. It breaks it down. The invisible road map that's been pointing mice to the same spots in my house for years PestLab erases it. And the slow-release castor oil base keeps both compounds active for 90 full days.
No trail. No signal. No way for new mice to find their way back.
I ordered two packs. Placed pouches in the guest room closet, along the baseboard where I'd found the nest, under the sink, at every entry point along the garage wall.
Then I waited.