Rodents!

Harvard wrote:
Traps with peanut butter, and never too many.

X2 on the baited traps.

I've had mice use my dryer sheets for nesting material; they ate a perfectly good bar of Irish Spring soap; And they chewed the bag containing the Fresh Cab.
The only sure way is baited snap traps, and lots of them!!
If the above mentioned methods worked for you, then your RV doesn't have any openings large enough for the critters to get in.
To the OP, try to find where they are getting in, and block/seal that opening.

I sprinkle decon in low places. Crevices..... Corners.... Storage areas.... Out of the way, but where the little boogers can find them.

If in storage, always keep plenty of traps and poison out.

I had a huge rodent problem in my 36' motorhome they caused a lot damage to my RV! They chewed the wiring harness to my genset over $1,000.00 to fix (my genset had to be completely removed from my RV to fix)! I've tried many things to rid them over the years. Bait traps did not work due to it constantly lures rodents to my RV via the smell of peanut butter or other food. I used Bounce Dryer Sheets a lot of people think there great on RV.Net, but the rodents where I'm at used the sheets for nesting material. I did have success with peppermint oil, but it was to much work going out every week and resoaking the cotton balls in every nook and cranny. I've had great success using 2 things #1. very coarse steel wool! I put the steel wool behind every drawer in the RV and every nook and cranny (runways) etc. #2. Then I went out and bought a Victor Pestchaser Pro it emits high frequency ultrasound that effectively repels rodents from large areas and will not harm humans or non rodent pets. The Pestchaser Pro looks like a small Boom Box and works 10 times better then those little ultrasound that a person plugs into a wall socket! I can honestly say that I never had a rodent inside my RV since! Steel Wool and the Petchaser Pro have been a great investment for me!

Traps with peanut butter, and never too many.

Bounce dryer sheets work well also. We've heard mice do not like the smell and after getting mice, we used dryer sheets in the places they were coming in & they never came back. Need to replace them every few months, but worked for us.

That white powder is likely Borax.. effective on cockroaches. Kinda beware.

We have a Class A that we store and we use Cab Fresh.

Seems to work along with electronic traps, that the batteries last about a year and we have three. One in the tank space below the floor and one in the bathroom and one in a kitchen cupboard.

The Cab Fresh needs to be replace every two to three months to be effective, but works great.

Here is a link..............CAB FRESH

Sticky mouse traps. We hosted for a month and were over run by them. Sticky traps got them all in a hurry.