content: used about 3 of these over a two year period, although in partly shaded places, and never caught any YJs. The reusable rescue trap(which I guess i am having trouble finding in stores now) worked fairly well. I did use water as per instructions, however. did not try the apple juice thing.Guess people don't find this review helpful, that is OK. There might be regional differences or other poorly understood factors. Just my experience with the product. The YJ problem is so bad around our property(especially after mild winter) got stung several times this year and personally destroyed 2 underground nests, yet they are still around. Have heard they can forage for a quarter of a mile away. We live in one of the Gulf Coast states and maybe that is a factor. Maybe our YJs are smarter than the ones in other places, who knows. I have to try this again but will use apple juice mixture this time.