We had mice. We tried traps, different natural repellents until this. Rodent Mace. We bought the concentrate which makes 10 gallons. But we use it straight, spraying it on an old t-shirt (getting it wet) and then placing it in the belly of the trailer thru a vent near the axles under the trailer. We leave a corner out when screwing the vent cover back on so we can retrieve the rag. I redo the process every 30 - 45 days, it literally drove them out. Inside the trailer was a hint of mint smell for the first couple of days.
2012 Ram 1500 Crew Cab 5'7" Bed
4 X 4 Engine 5.7L Hemi Gear 3.92
2015 2809W Windjammer (Diamond Package)
Husky Centerline WDH