Check them if you have any left over from last year.....

I had a couple bottles left, so I decided to spray a little from each bottle on an old towel.... They both had a rotton smell to them..... I remember the same thing happening last year, except I found this out after spraying down on my first hunt...

Apparently this stuff breaks down & spoils after a while.... I used to go to Wally World & buy up a bunch on clearance after season... I probably wont do that anymore....
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Thank god for kids.