insects

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Another suggestion, get some SunPacs, they are little cachets that you put in closets and sailboats (and RV's) to prevent mold. They emit formaldehyde, and it kills everything. Put several cachets up high around the inside of your RV, and open all of the closets and cabinet doors and drawers. This works best if used when there are several months that you are not going to use the RV. Then when you open-up the RV, open all the windows and doors and let the unit air out before you use it. I use them in my park model trailer in Florida over the summer, and I have never found a live roach or spider since I started using them. If I've found anything, it was dead. While the bombs kill most of the live roaches, in most cases, it doesn't last long enough to kill the eggs. The SunPac cachets last three months. You may have to look for them, or buy them on-line, we've found them at Walgreens.

Another vote for the bombs!

There are so many places for them to hide, you need to attack this from many fronts. I have successfully rid one of our previous TTs from roaches, here is what I did.

Find those hard to reach places:
Under the shower tub
Under the sink
The furnace plenum
Under the refridgerator
Do the bottoms of your cabinets have a floorpan that can be removed?

Plan a time where you will not use the unit for about two weeks.

Remove all of the drawers, linens, dishes, silverware, food, and open the spaces I mentioned above if possible. Turn off the propane (all pilots out) and disconnect the electrical. Shut all of the vents and windows.

Set off 2 or so of the roach bombs (the aerosol kind, we used Hot Shot) inside the unit. If you have any large external compartments, toss one in there also. Vacate and close. Wait a week. There will be dead critters all over when you reopen. I followed up by putting bait paste under the compartments before replacing them.

Wipe and clean everything thoroughly afterward.

This worked for me.