By Cheri Sicard
If you haven’t battled a mouse invasion in your RV yet, you probably will at some point, sadly. Mice love RVs, especially when parked in busy or popular camping areas where crumbs, scraps, and easy access make every home-on-wheels a rodent magnet. Thanks to common RV construction, there are plenty of gaps and weak spots where these tiny intruders can sneak in.
In the video at the end of this post, Carolyn of Carolyn’s RV Life [176K subscribers, 42M views] shares her methods and a secret weapon for keeping her RV rodent-free.
RVs have several weak spots mice exploit:
- Engine compartment: Mice scamper up tires and squeeze through gaps under the hood. Some RVers leave the hood open, hoping the light will deter mice, though this only sometimes works. Others try solar or electric lights under the rig, but results vary.
- Rear electrical storage and tank valves: When cords hang out for shore power, mice can use them like a ladder, climbing inside through barely-there openings. Remember, these critters can squeeze through gaps as small as 1/4 inch.
- Roof vents and branches: Holes in fridge or stove vents and low trees that brush the roof provide easy access.
Getting rid of mice: What works (and what doesn’t)
When the mice are already inside, it’s time to act fast:
- Humane catch-and-release traps: These require carrying live mice away (at least a mile), which isn’t always practical. They tend to come back if released nearby.
- Poison: Never use poison! It’s dangerous for pets and wildlife. If a dog eats a mouse that has consumed poison, the dog could get sick—or worse.
- Glue traps: Often seen as cruel, these only make the mouse suffer.
- Plastic snap traps: Inconsistent results, and sometimes don’t trigger.
- Electric traps: Some work, some don’t. They can be expensive with unreliable results.
The best solution? Old-fashioned wooden snap traps. They’re cheap, work every time, deliver a quick end, and mice don’t suffer. Use peanut butter or chocolate as bait, place where droppings are found, and check daily. There’s no need to toss the whole trap after use since mice are more attracted by the scent of other mice. Always use gloves for safety and hygiene.
Finding all traces of mice is key. This means:
- Identify mouse droppings and chewed-up materials to trace entry points and nests.
- Vacuum all affected areas—taking it to the car wash for a deep vacuuming helps.
- Scrub down shelves, floors, and walls with bleach to wipe away scents and residue.
- Remove all signs of mouse life, since their scent is a huge signal to others.
After a thorough cleaning, physically block every way in
- Use steel wool for small holes. (Keep it away from wiring, since steel conducts electricity.)
- For larger openings or damaged screens, use a self-adhesive vent patch. These work especially well for roof and fridge vents.
- Look for holes caused by old screens, wear-and-tear, or where a tree limb touches the roof.
To make your RV less tempting
- Transfer every mouse-attractive food (nuts, grains, snacks) into airtight glass jars.
- Store any overflow or extra bars in the microwave, which works as a sturdy, mouse-proof container (even if it wasn’t built for this use).
- Skip cardboard and flimsy plastic; mice tear into those with ease.
- Keep all baking items, chocolates, and grains sealed tight.
Mice don’t just hunt for food, they also steal materials for nests. Decluttering helps:
- Get rid of old papers, receipts, and loose items, especially below benches and in storage bins.
- Keep floors and surfaces crumb-free.
- Inspect and clean hidden nooks where mice might hide or build a nest.
The secret weapon?
Carolyn’s top tip for staying mouse-free? Peppermint oil spray. (Side note from Cheri: In my experience, this DOES NOT WORK, even though Carolyn says it does. It smells nice, but I doused one of my empty RV cabinets with peppermint oil, then caught a mouse in a trap there about an hour later.)
Carolyn says to mix a few drops of peppermint oil into water and use a spray bottle to mist all the major entry points outside the RV, including compartments, under the hood, tires, and around cords.
- Mice hate the strong scent and avoid these treated spots.
- Reapply every six months for lasting protection.
- Warning: Peppermint oil is toxic to dogs and cats. Only spray outside areas, never where pets can sniff or lick.
Have you used peppermint oil to deter mice or rats? Has it worked for you? Please leave a comment below.
Protect you and your pets
A few final safety tips:
- Wear gloves when handling traps or cleaning droppings—mice carry diseases.
- Check traps daily, both for effective removal and to keep pets from finding dead mice.
- Avoid all poisons and keep essential oils away from areas where pets roam or play.
Staying mouse-free isn’t luck. With the right know-how and smart habits, every RV owner can enjoy pest-free travels—all year long.
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RVDT2741
Thank you for adding this piece of advice: Warning: Peppermint oil is toxic to dogs and cats. Only spray outside areas, never where pets can sniff or lick. I like the scent of essential oils but rarely use them because we have 2 dogs. There is too much conflicting information about which ones are safe around pets.
While it’s possible peppermint oil may deter mince from choosing your RV for a home, it most certainly never slowed them down once they had already found ours. I soaked over a dozen cotton balls in peppermint oil and placed them all over the inside of the RV (where we already had mice) and it made no difference. Still found lots of fresh mouse droppings after a week.
If using snap traps, the only bait to use is a small piece of a Slim Jim. Rats will yell at you to get out of the way as you’re baiting the trap! Also, never use steel wool when plugging holes as it rusts pretty quickly. Use bronze or stainless steel wool pot scrubbers instead. A really good product to thin the herd is called Rat X. All natural, only bad for rats and hamsters, and will not harm any other animal if they eat the Rat X or the dead rat. Puts the rat in a gluten coma and then desiccates the body, so no smell. The electronic gizmos and smelly things are worthless.
I’ve seen mouse chewed peppermint oil infused caches (think oversized tea bags). I’ve watched squirrels go around rather than under our RV when I have spread Diatomaceous Earth – but run right through when being chased. Physical barriers are the only preventative and it will add to your maintenance list.
Never had a mouse problem until we did. Thought I had blocked all holes – and then realized the gear driven slide room mechanisms go all the way through the frame. And on the other side of the frame was the enclosed underbelly. The mice could just walk right in. I use self-adhesive metal mesh drywall patches to close the extra space around the slide mechanisms. So far so good.
We have had huge success with ultrasonic plug ins. They sell them at Walmart in the rodent and insect section. We have Victor brand.
Thank you for highlighting and summarizing the video’s main points, Cheri! If one uses essential oils, then they should be redone at least monthly if not weekly. In our experience essential oils are nice air fresheners, but little benefit deterring mice. We have barn cats and they seem pretty effective in deterring mice when we are not traveling. Have a great week and safe travels!
Victor snap traps are so effective that they have evolved super mice. The new ones with the plastic pedal are hypersensitive to touch and so they can catch mice that are stealing the bait. But quite challenging to set. Also the plastic is an attractant itself.
I have had mice annually in my tail/brake lite assy’s. Best solution was spray form stuff. It stays in place, lasts however long – been a few years now with no mice and no more chewed connecting wires! Since the scent of mice attracts additional mice – I would guess the spearmint oil just covers the natural mouse scent and doesn’t really deter determined mice.
I have tried everything mentioned in this article. What works for me best is “Fox Urine”. I store my RV in a shed with concrete flooring. They still get in. I spray fox urine everywhere I think they can get in the bldg. I spray a piece of cardboard and place it under the RV. Seems to work. Keeps them out of the shed and the RV. Do have to update it periodically to keep it potent. You can get it on Amazon.