Nothing works everytime. I've used the can many times. It's only worked for me during the rut. ...and still not every time. I prefer to blow in the hole of the can instead of turning it over. It sounds much better and you can control the toneand loundnessof the bleat better.

Some of these guys use a few soft tending grunts with the bleat call as well...and with success.As you said..I usually use the can in 20 minute intervals. I usually don't start using the can until one hour after safe light. And...if no deer come I won't use it the next day. I've only called in 2 bucks with it. It's not a guarantee. However; two bucks is enough to make me use it at times. I would prefer to use it during the rut.
c7