I caught a bait two years ago on five yellow extracting small cell combs. This year I caught a bait in a funky Styrofoam lined packing crate containing two moth eaten yellow small cell extracting combs and an empty bottle of LGO. Thirty years ago a friend caught a bait in a brand new box with foundation he left outside his garage. But I usually use lots of black combs.
Try melting a bunch of propolis and beeswax on the inside of the TBH, that will help.
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