You dirty rat! Do mice REALLY hate soap?


By Chris Dougherty
Chris Dougherty is a certified RV technician. Here is a letter he received from a reader while he was serving as’s technical editor.

Dear Chris,
We purchased a 2004 Gulf Stream B+ motorhome in 2010 from a private owner. We live in southwest Ohio in a rural area. Soon after we bought it, we learned that one thing that will keep mice out is none other than Irish Spring bar soap. We bought a multipack and dispersed them throughout the motorhome and have been rodent free since then!! It does a great job and the odor is pleasant, plus when you run out of soap you have a good supply!! Hope this information will help others. Thanks. —Jim and Donna

Dear Jim and Donna,
Thanks for the tip. I have worked on eliminating rodents from RVs for years and have personally debunked dryer sheets, sonar devices, predator urine crystals, and more. Frankly, I have had mice chew into Irish Spring boxes, and start chewing the bars, but that’s it. They never consume much more than that … could have been a sign!

Aside from this, a company called Mouse Free has developed a spray-on undercoating that is supposed to deter mice. Coaches with current infestations must first be completely rid of mice, otherwise the infestation will continue. It’s a pricey product, but if it works, it’s well worth the investment.

Follow this link to a “talking heads” video, where Chris chats up Jonathan Del Grande of Mouse Free as he describes his product.

Editor: Here’s a review by Gary Bunzer, the RV Doctor, on Mouse Free.

Here’s the Mouse Free website. Mouse free is available at RV stores and dealerships.



8 Thoughts to “You dirty rat! Do mice REALLY hate soap?”

  1. Tommy Molnar

    While we’ve never had a rodent problem (knock on wood), I would rely on the old standby – MOUSETRAPS. And not the ‘humane’ plastic type. I like the tried and true wood based spring ones that cut them in half.

  2. Seann Fox

    Irish Spring works well at keeping ME out of the RV. Triggers an allergy attack. I do like using the cab fresh but really have no idea of how well it works.. Just because you have no mouse in the house does not mean its working.. You may be in a mouse free area.

  3. Diane

    We have used both Irish Spring soap and moth balls. Neither worked. I guess our mice are just too smart!!!

  4. Wayne

    Sorry, misspelled website. Should be

  5. Wayne

    I use a product Fresh Cab. It has a pleasant smell and really does the job. A few years ago I had a mice in the fifth wheel. Had trapped a few but still had droppings after trapping. Put the pouches around inside and within a day or two, no more mice. The website is I have no affiliation with this company, just a happy camper/customer. I have used the product for several years.

  6. Bruce Winget

    BW We used irish spring one year .It worked great. The next wear
    they chewed on the bar of soap .I have better luck running a trap

  7. J French

    Mice & rats are actually attracted to soap regardless of its odor.
    What will work is moth balls.

  8. K. R. V.

    I’ve heard moth balls work, but only in the off season due to the smell.

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