I have a safe in my house that holds some videos, passports and some insurance paperwork. I went into it and it smelled a bit wierd. I just noticed the passports have a light mold/mildew stains on it. The safe is not in an area that is air conditioned and heated. Its also not getting wet. Their is a desicant pack. What is this from? And should I just clean it out and that will be it? Thanks!