Unexplained problem

[Branchman]

I have a 2014 FR3 with a problem that has me stumped.

As seen in the photo, there is a recurring pile of what appears to be tiny pieces of styrofoam that pile up on the ground of the right rear corner of the rig. Also they appear in the inside right corner.
No signs of droppings of any kind.

The amount shown in the picture is one nights accumulation.
The spot was clear the evening before.

I am baffled and any help is appreciated!

Attachment 1
Attachment 1

[Iwannacamp]

It is a guess.... some sort of beetle or ant colony

[Duckogram]

The styrofoam is your insulation. It can be infested with insects (ants, termites, etc.). I suggest you try ant gel. Put a gob directly above the pile of dust in whatever crack/crevice/hole you find.

[keegantimber]

Definitely ants. Do a search here. Others have posted same circumstances.