RV Owner Exposes Why Sealing Your Camper Doesn't Keep Mice Out (And What Finally Worked)

After three ruined winters, a retired contractor shares the $49 fix he wishes he'd found sooner. Read his story below.

"I sealed every gap I could find. They still got in. I couldn't figure out what I did wrong." 

— Ray D., Michigan

I opened my camper in May and my heart broke.

 

If you store an RV, a camper, or a fifth wheel...

If you seal it up every fall and hope for the best...

If you've ever opened that door in spring and smelled it before you saw it...

Then please read this whole thing.

 

Because I did everything right. Three years in a row. And I lost every single time.

It took me until last spring to find out why. And it had nothing to do with how well I sealed it.

 

Walk into any RV service center in April. Ask what they're busiest with. They'll tell you the same thing every time: rodent damage.

 

And here's the part that stopped me cold. A lot of insurance policies don't cover it. Mine didn't. I found that out the hard way, sitting at my kitchen table with the policy open.

 

What I'm about to share isn't a trap. It isn't poison. There's nothing to empty and nothing to clean up.

 

It cost me less than one hour of a mobile detailer's time.

How I Lost Three Winters In A Row

 

My name is Ray. I'm 63. I spent 40 years in construction before I hung it up.

 

My wife Diane and I bought our travel trailer for one reason. The plan. The parks. The grandkids in the bunk beds. Two months in Arizona when Michigan gets mean.

 

I am not a careless man. I want that on the record.

 

Every October I ran the same routine:

  • Winterize the water lines
  • Strip every scrap of food out
  • Wipe down every surface
  • Crawl underneath with a can of expanding foam
  • Seal every hole I could find

I'd lock that door feeling pretty good about myself.

 

Then May would come.

 

What Was Waiting Behind That Door

 

The week before Memorial Day, I walked out with the keys in one hand and the awning brush in the other.

 

I opened the door and the smell hit me before my eyes adjusted.

 

Droppings on the counter. Droppings in every drawer. The mattress was chewed open and nested in.

 

And here's the thing that made no sense to me.

 

There were pine nut shells everywhere.

 

Pine nuts. From trees a hundred yards away. There was no food in that camper. Not a crumb.

 

They brought their own food in.

 

I stood there doing math. Mattress in the dumpster. A full week of scrubbing in a mask. Cushions I had to replace. And when I finally got a look at the wiring in the underbelly, I found chew marks.

 

That was year three. Diane looked at me and asked if we should just sell it.

 

That was the night I stopped buying products and started asking questions.

What Nobody Told Me About Sealing

 

I got my answer from a retired RV tech on an owners' forum. He'd been doing this 30 years.

 

He asked me one question.

 

"How small a hole do you think a mouse needs?"

 

I guessed a quarter.

 

He said: a gap the width of a pencil. A mouse flattens its ribcage and squeezes through.

 

Then he told me the part that changed everything.

 

Your camper isn't a sealed box. It's a building on wheels with hundreds of factory holes in it.

 

Slide-out corners you can see daylight through. Water and drain penetrations into the basement. The spare tire well. Propane line entries. The pass-through storage bays.

 

You cannot foam a moving building shut. You'll never find them all. Nobody does.

 

And then he told me the thing I'd had completely backward:

 

They don't come for your food. They come for the empty space.

 

Dark. Dry. Insulated. And nobody opens the door for five months.

 

To a mouse in October, a clean camper isn't protected. It's a vacancy.

 

That's why cleaning it out never saved me. I wasn't removing the reason they came. I was building them a better one.

Why My Peppermint Spray Quit After Three Days

 

So I asked him about the peppermint spray I'd been buying.

 

He laughed. Not at me  at the bottle.

 

Mice run on smell. A strong scent doesn't scare them. It blinds the sense they navigate with. They can't read the space, so they leave.

 

But it only works above a certain strength.

 

Here's what nobody prints on the label. Those oils are in a water base. Water evaporates.

 

Day one it's strong. Day three it drops below the line. And below that line, a mouse doesn't avoid the smell.

 

It learns the smell is harmless.

 

Once a mouse learns that, it never un-learns it.

 

I sat there feeling sick. Every cheap spray I'd ever bought hadn't just failed me. It had trained them.

 

It explained the dryer sheets they used as nesting material. It explained the plug-in that worked for a week. All of it.

What Actually Holds A Scent For Five Months

 

He told me the fix wasn't more peppermint. It was peppermint that can't leave.

That's when I found PestLab™ Rodent Repellent Pouches.

 

I'll be honest. I almost scrolled past. Another pouch. But this one was built different, and the difference is one ingredient most people ignore.

 

Castor oil.

 

Castor oil is heavy, thick, and it barely evaporates. Suspend aromatic oils inside it and they can't flash off. They have to seep out slowly.

 

The castor oil isn't the scent. It's the clock. That's the part every drugstore spray is missing.

And PestLab doesn't use one oil. It uses four working together:

  • Peppermint — overwhelms the sense they navigate by
  • Cinnamon — a second, unrelated aromatic they can't tune out
  • Cedar wood — the same thing that's protected cedar closets for 200 years
  • Castor oil — the slow-release base that holds it all above the line

One note is easy to adapt to. Four notes, held steady for 30 to 90 days, is a wall that never drops.

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Putting It To The Test Last October

 

 

I ordered enough to do the whole rig. Here's exactly where they went:

 

Under every seat. Both storage bays. Every drawer and cabinet. The slide-out compartments. The pass-through. The underbelly access.

 

Not by the door. Everywhere. You're not guarding an entrance. You're making the whole space unusable.

 

Then I locked it up and tried not to think about it.

 

Five months later, I opened that door in April.

 

I stood there a second before I stepped in, the way you do.

 

Nothing.

 

No smell. No droppings. Not one drawer touched. The mattress was exactly how Diane left it.

 

First clean spring in three years.

 

My neighbor Dale watched me pull it out and asked what I did different. I gave him two pouches out of my box. He's ordered his own since.

 

What Makes PestLab Different

  • Works within 72 hours of placement
  • 30 to 90 days of protection per pouch
  • No traps to check, bait, or empty
  • No poison — nothing to kill your dog or a barn cat
  • No dead mice in a wall smelling up your rig for three weeks
  • Plant-based and safe around kids, pets, and livestock
  • Weather resistant — built for unheated storage, garages, and barns
  • 90-day money-back guarantee

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What This Actually Costs

 

Let's talk numbers, because that's what got me.

 

That mattress was $340. The cushions were more. The wiring repair quote made me put the phone down.

 

And my policy didn't cover a dime of it.

 

PestLab works out to about 33 cents a day.

 

Thirty-three cents. On a rig that cost more than my first house.

 

It's the cheapest insurance you will ever buy on a $40,000 asset. And unlike your actual insurance, this one doesn't have rodent damage buried in the exclusions.

 

Backed By A 90-Day Money-Back Guarantee

 

You can try PestLab completely risk-free.

 

If you're not happy, PestLab will refund you. No hassle, no hard feelings.

 

With 140,000+ customers and a 4.8-star rating, they're not worried about it.

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One Thing About Timing

 

This matters more than the discount.

 

The pouches have to be in there before the cold pushes them in. That's late September into November, depending where you are.

 

If you wait until you smell something in spring, you're not preventing damage. You're cleaning it up.

 

That's a week of your life in a mask. I've done it three times.

 

Stock runs thin every fall for exactly this reason.

 

You've Got Two Choices Here

 

You can seal it up again this October the same way you did last year. Cross your fingers. And find out in May.

 

Or you can spend about 33 cents a day and open that door in spring to exactly what you left.

 

I know which one I'm doing. I've already ordered for this winter.

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With more than 140,000+ 5-star reviews

TrustScore 4.8 144,354 reviews

What Others Are Saying

 

"Storage lot, five months, no heat. Every year before this I found droppings in the bunk. Put these in every bay and cabinet in October. Opened it in April and it was clean. That's all I wanted." 

— Gary M.

 

"I stopped using poison after my neighbor's dog got into a dead mouse. Wouldn't do it again. These go in the shop, the tractor cab, and the camper. No traps to check all winter." 

— Denise W.

 

"Skeptical, because I'd already wasted money on the plug-in things and dryer sheets. This is the first thing that was still working in month four. That's the whole difference." 

— Tom R.

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