Youu0026#39;ll know itu0026#39;s time to replace the jar once all the beads shrink. IngeniousnFragrance lasts up to 45 daysnA quiet Interlude of the season is reflected in this airy, refreshing mix of Watery Leaf notes, warm amber and crisp, brisk airnThis is an aftermarket of generic partnThese little beads are actually a big deal-they neutralize odors and refresh small spaces for 45 days with your favorite fragrance. That's a month and a half of blissful use of lockers, closets, bathrooms and all those other places with stagnant air. They're so easy to use. . . Just pull off the protective cover and Replace the decorative lid. Clever cutouts allow the fragrance to diffuse into the air.