As RdFx says, testing is the only way to be sure. However, i'll wager the glands will attract just as good as when they were fresh even though they may smell a little different to the human nose. Concerning the 40 year old Lenon lure that RdFx tested and still works, I had some experiences with that too. About 10 years ago I had a big time Western ADC trapper testing some new lures for me. I would label the test lure #1, 2, 3, etc. Meantime I had a sporting goods store call to say they were cleaning off their shelves and found a bunch of lures they bought in 1956 and wondered if I would like them. I said sure do. I got the lures and they had turned to a black color and the consistency of tar. I sent a bottle of it to the ADC trapper who was testing lures, not telling him what it was, just marked Test lure #?. It wasn't long and the trapper reported that it was the most outstanding lure he ever tested and wanted a whole case of it at any price. Ace :grin: