Construction debris shakes loose inside during travel

My Pebble rains construction debris. Every time we take it on the road, more shakes loose. I sweep it out and when we get to our destination there are tiny bits of shiny metal, flakes of foam, and sawdust-like crumbs all over the floor. I sweep again, rinse and repeat.

Is this just me or are others having this?

I'm worried the dog will Hoover up some of those tiny metal bits. Leaving all the debris up in the panels or wherever it is coming from feels very sloppy and unprofessional.

Also, the corners of my fitted RV Queen sheet have black oil stains, like the Murphy bed mechanisms rubbed off on them. Is the mattress rubbing up on something it shouldn't? Is this going to continue? Yuck.