<p>Could actually be the laundry detergent-- if she’s using the dye-free stuff, it smells exactly just as you describe.<br>
We used to use that when D was living at home-- it isn’t quite body odor-- just musty stinky…not sure about the old person references you’ve made—nursing homes smell like urine- but that’s not what you mean i do hope not!
If she uses unscented products, that means she is allergic to strong perfume type odors herself. So no fabreeze.</p>
<p>Get a cheap throw fleece blanket at Walmart and throw it over your bed when you have people in the room…this way, she’s not targeted about the bed. This is easier to wash than the comforter.</p>