"Ten seconds. Never thought about it again until April."
I winterize the same way every October. Added Fugelyn two years ago. Ten seconds. Never thought about it again until April. Clean both times.

One placement before lockup. 90 days of continuous protection. Nothing to check, reapply, or reset. Here is why serious RV owners are adding this one step and never thinking about it again.
See How Simple It Is →Snap traps need checking. Peppermint spray needs reapplying. Electronic repellers need power. Steel wool needs inspecting for new gaps. Every option the forums recommend has one thing in common — it requires you to come back.
For an owner who takes their winterization seriously, adding a monthly maintenance task to a stored vehicle is not a solution. It is a new obligation on top of an already full routine — one more thing to forget, one more trip to the storage lot in January, one more gap in protection every time life gets in the way.
The winterization checklist works because every step on it is done once in October and holds until April. The rodent protection step needs to work the same way.

The plan sounds reasonable in October. Drive out to the storage lot every four weeks, reapply the peppermint spray, reset the traps, check the seals. Thirty minutes, once a month, problem solved.
By November it is still happening. By December it is getting harder to justify. By January the trip gets skipped. By February the protection has been gone for six weeks — and the mice that waited out the scent have already moved in.
This is not a failure of effort. It is a failure of design. A solution that requires monthly presence during a storage season was never built for how RV owners actually live.
Fugelyn requires one trip. The one you are already making — the October lockup. That is the only time it needs you.

This is the complete placement process: open the storage compartment or dinette cabinet, place one Fugelyn pouch inside, close it. Repeat for the rear cabinet and near the slideout seam if you want full coverage.
That is it. No tools. No measuring. No mixing. No power source. No return visits. No disposal until spring — and even then it is just picking up a small fabric pouch and replacing it with a new one.
For an owner whose winterization checklist already takes two hours, this is the one item that takes ten seconds and covers the single most expensive gap the rest of the checklist leaves open.
One step. Added once. Done for the season.

A space that smells like a predator threat is a space mice don't enter. This is documented animal behavior — not a claim invented for marketing.
The challenge with every other scent-based solution is the carrier. Cotton balls dry out in 48 hours. Peppermint spray fades in a week. Corn-cob fill — used in most competing pouches — gets consumed by mice, destroying the barrier from the inside.
Fugelyn's mineral fill cannot evaporate, cannot dry out, and cannot be consumed. The essential oil blend releases at a consistent concentration from day one to day 90. The signal that keeps mice out on the first day of storage is the same signal keeping them out on the last day — with nothing required from you in between.

Rodent damage to RV wiring runs $800 to $3,200 depending on what mice reached and how long they had access. AC unit damage starts at $1,200. None of it is covered by standard RV insurance — rodent damage is a maintenance exclusion in virtually every policy on the market.
Fugelyn costs $0.37 a day. One placement covers the entire 90-day storage season. First order is buy one get one free — two seasons of protection for the price of one.
The owners who hesitate spend more time thinking about it than the placement itself takes. Ten seconds to place it. $0.37 a day to run it. One line added to the checklist that closes the single most expensive gap on it.

Most owners who take winterization seriously describe a specific moment at the end of lockup — the walk back to the car after closing the door. For owners with an incomplete checklist, that walk carries something. A quiet background awareness that one thing wasn't handled. A mental note to come back in November.
Owners who added Fugelyn describe that walk differently. Not because the checklist got longer — because it got finished. Every line checked. Every gap closed. Nothing left open until spring.
They drive away from the storage lot the same way they approach every other part of their winterization — with the certainty that comes from doing the job completely. That is what one added step actually changes. Not just the damage rate. The feeling of locking up.

Based on post-purchase survey of verified Fugelyn customers

First order is buy one get one free. Place it before lockup. Do not think about it until April.
This product is designed to help repel rodents and is not guaranteed to eliminate an existing infestation. Results may vary. Terms and conditions apply.
I winterize the same way every October. Added Fugelyn two years ago. Ten seconds. Never thought about it again until April. Clean both times.
Tried traps, spray, everything. All of it needed me to come back. Fugelyn is the first thing I found that works the same way the rest of my winterization does — once in October, done until spring.
My winterization checklist has not changed in twelve years. Added one line two seasons ago. That line is Fugelyn. Nothing else changed. Nothing waiting for me in April either time.
The placement took less time than airing up the tires. The protection lasted longer than everything else I tried combined.