I’ve been in the car twice today. The first time I didn’t notice any smell at all. The second time I put my nose on alert when I got in the car and I smelled the faint fragrance of the dryer sheet. So, either the whole dryer sheet as deodorizer thing lasts 3 days per sheet, or it calms down after one day and leaves a nice subtle fragrance for awhile. I vote it’s the second one.