Good point!
Animals learn.
Deer are good learners.
The smell of urine carries for quite a distance, and has an "best if sniffed by" date.
If every time they smell stale human urine, they find a tasty, seedling or three. . . .

However, the dryer sheets actually bollix the scent receptors in CO2 sensitive insects.
Mosquito's and Fungus gnats hunt by scent, as do the Moths responsible for bud worms.
Plain old dryer sheets have solved three of my worries.

Aloha,
Wee