Just got this on an email from buckmasters.....pretty neat little trick: Get a Glade Wisp or an Oust Fan air freshener (both use batteries). Be sure to wash and soak the container that holds the liquid really well to get the perfume smell out. When you have washed it out, fill with doe-in-heat and set on a stump or place of your choice. The Glade Wisp puffs the scent out every few seconds, and the Oust Fan has a 15 minute timer on it to where it blows every 15 minutes and shuts off. Both last up to 60 days, and I have found that this works really well. Each costs around $7.