Strange residue in camper

[GrumpyG]

Today I went out to my camper to check things out and I found some strange spots on the cabinet fronts. They were white, dry, and wiped away easily. The only clue I have is that they appeared under the A/C.

Anyone seen anything like this before?

[SummitPond]

Mildew maybe? We sometimes get it when in Florida and the trailer is buttoned up, it gets damp out side (and thus high humidity inside) and we forget to put out the Damp-Rid. A weakened vinegar spray is what we use to kill it.

[GrumpyG]

Well, I guess it could have been, but the A/C was on, set to 82. It has been humid, though.