[nimbuscloud]

"For some with allergies (a few members of my family), a stay in a room with even a slight smoke smell can be extremely unpleasant."

For some with allergies, the smell of cleaning products, room deodorizer, fabric softener, or lingering scent of perfume can be extremely unpleasant.

[Young Scholar]

True; they are similar to smoke that way (different people will react differently to each).