Irish Spring Soap to Repel Rodents

As we live in the woods, we have many rodents such as mice and rats in the area. Recently we have had rats in the engine compartment of our vehicles. They have been leaving droppings and pulling the insulation from the hood of our pickup. They use the insulation and other materials to build nests inside the engine area. We needed to find a good solution to repel these rodents and drive them away from our vehicles.

Irish Spring Soap Piece

I took a bar of Irish Spring soap and cut off a small piece about 1 inch long. I then cut that piece in half ending with a piece of soap about 1 inch square as shown. I placed a piece of soap inside the engine compartment on the battery tray as this was one of the places we have been seeing droppings. I repeated this process for all our vehicles. Then I waited and watched.

Apparently the strong soap smell from the Irish Spring soap repels the rodents. Since I have placed the soap pieces inside the vehicle engine area, we have not had any signs that the rats have been back.

This idea may also work well for other areas where you do not want mice or rats such as your house, sheds, or garages. Give it a try and let me know how this rodent repellent works for you.

**Follow-up comment – I am hearing from several of you that this doesn’t work. I am adding a warning to others to beware that this may not work on mice. Please read the comments to see the outcomes of others.

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19 Responses to “Irish Spring Soap to Repel Rodents”

  1. Nicky B September 4, 2014 at 2:31 pm #

    I tried the Irish Spring Soap to repel the mice/rats, came back a few days later box was chewed open and soap was gone. They ate it.

    • Cindy September 7, 2014 at 12:50 pm #

      Nicky – Sorry to hear your results. I know some people have used this idea and it worked while others have had only marginal success. You might try the cayenne pepper tip as many people have had great results with it.

  2. Nicky September 5, 2014 at 7:17 am #

    We have field mice in the attic (they don’t bother us) but the field rats are getting in the house/walls. But when the house was built they didn’t put in the metal to keep them out; plus no basement. I doubt they left cause my dachschund keeps hearing them. Oh well worth a shot.

  3. Darlene Wirll September 7, 2014 at 9:54 am #

    I totally agree with this. I have a cabin that I have to close for the winter..I heard about this and thought thati would try it….since I have been using the soap, I have not seen a mouse at my cabin…..I also have a puppy and I don’t have to worry about it harming him…

    • Cindy September 7, 2014 at 12:54 pm #

      Darlene – Thanks for sharing your success story with using the Irish Spring soap tip.

  4. Lisa October 24, 2014 at 6:26 pm #

    I use Irish Spring every year in my RV. The only time the nice chew the soap is if we accidentally get aloe instead of original. We also never leave the boxes out as mice love cardboard for nesting. It has definitely worked for us!

  5. pat deDat November 22, 2015 at 8:54 am #

    as I am a nurse assistant,i find that rats are curiously attracted to human droppings as well. crumbs are just one of these problematic areas as we all tend to hamper the procurity of our environments. I did tie a string of sheet metal to a cupboard as mice do have visual proximity. and finally, the smell of burnt nettlings can deter a multitude of critters as they tend to hone in on the parameters of their vessels. much luck to all !

    • Cindy November 23, 2015 at 6:26 am #

      Pat – Great information about the metal to detract mice. I hadn’t heard about that idea before. Thanks for stopping by and leaving a comment.

  6. Miss BJ in Colorado December 15, 2015 at 7:19 am #

    Great info..husband and I are fighting a hord of invading mice this year. My cats cant even keep up and instead now often just watch them…. maybe the soap and nettles will help too. I’m desperate. If I start to say anything in town, the people act like we live in a shack or shed with trash all around that attracts the field mice, but this is just a really bad year for them. The field mice even try to build homes in my clothes hanging up. ..ewwww. i find dry catfood and dog food I feed our pets everywhere. We keep dry foods in plastic containers and the birdseed in a heavy plastic trash can with clasps that snap over both top sides. I’m about to try peppermint oil on drawers, as I’ve heard that repels them too. Thanks fot the ideas..these are all I have so far..just not enough this year. You can hear the little pests chewing at night all over different places. We’d move if we could, but its not an option, so all ideas are welcome.
    Sincerely, Miss BJ- in the mountains of Colorado

  7. Michelle March 24, 2016 at 11:07 am #

    I’ve heard you have to grate the soap up using a cheese grater or an old food processor, then put it out, apparently leaving the whole bar does not work, I’ve got some friends who close their lake house up for the winter and they swear by this.

  8. Sandy April 22, 2016 at 3:34 pm #

    My daughter and a friend both have new trailers., last year when they closed up they both put down Irish Spring soap along with other potential mice deterents. Well when they reopened the trailers this week, both of them had mice droppings. And has for the Irish Spring soap, the mice had a field day on the Irish Spring soap. It was chewed away. SO, Obviously the Irish Spring “DOES NOT WORK”

  9. Frank May 2, 2016 at 8:59 am #

    We tried using the Irish Spring..Total Fail!!! The little buggers ate the soap and then ended up with the bloody shits all over our RV.

    • Cindy May 2, 2016 at 11:45 am #

      Frank & Sandy – I am so sorry to hear this didn’t work for you both. I am posting your comments so others know this may not work and avoid using this idea. I have added a warning to the original post too. Thanks for sharing your outcomes.

  10. Victoria June 7, 2016 at 8:12 am #

    I put a whole bar of Irish spring in my rv and never had any more mouse droppings. I’ve tried other methods like dryer sheets, they only lasted for maybe a month.

    • Cindy June 7, 2016 at 6:24 pm #

      Victoria – So glad you had good results with the soap.

  11. bill July 25, 2016 at 10:11 am #

    Recently went to light the bbq and heard a squeak. Didn’t want to fry the critter, so quickly shut it off. Then I tapped bbq with the brush and the mouse refused to budge! Out came the heavy artillery (garden hose) and that got his attention. After cleaning the bbq, a few days later noticed a small hole chewed on the bbq cover and attempted nesting material. I shaved pieces of Irish spring and laced them with cayenne pepper…no luck, pieces removed and guess eaten! The previous year I used @ 6 individual packets of moth balls throughout the bbq and that seemed to work.

    • Cindy July 27, 2016 at 11:43 am #

      Bill – Thanks for sharing your experience with mice in your BBQ. It is good to know that moth balls may be another deterrent for people to try.

  12. Jennifer October 10, 2016 at 4:45 am #

    Irish spring cut in pieces have deterred mice for me in my camper, however the smell does wear off and I swear they become immune. Our camper is stored on a campground during the winter, with weather permitting I switch the soap monthly with peppermint soaked cotton balls and I also use dryer sheets. I don’t use poison because it acts as a good source and I feel it attracts them, I am trying this year a homemade hot pepper spray to spray around the outside perimeter of the camper. I also rake all acorns, pine cones and other food sources away from the camper when I change my deterrent inside.

    • Cindy October 10, 2016 at 8:03 am #

      Thanks so much Jennifer for sharing your experience and ideas for deterring mice.

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