I pretty much replace mine each year, I have gotten pretty good at knowing how much I will use throughout the year and stock up about the first week of September. This usually lasts me through the majority of the season. Any that I have leftover I use up when checking my trail cams, putting out corn and scouting. I know that Dead Down Wind has a shorter shelf life then what I use (I use scent away). Something to do with the ingredients in DDW cause this shorter shelf life. I know I have tried their products and had some leftover and it started to get little black balls in it. This was probably two months after the season ended, not sure if the premixed packets do the same or not if they have not been opened.
