I love this nectar. It works great. However, the bottle I got was so big that since buying it last year, August 24th 2020, I have barely used it. As of this post, it's been nearly a year since I bought it. I noticed something seems to have been killing my ants recently and possibly for a month or two. My harvester ants seem unaffected. The only thing I could think of was the nectar. After doing some experiments, I believe the nectar has gone bad and is now killing my ants. Just making the post as a warning to others who might use this nectar or in case someone believes the nectar isn't the problem. Hopefully someone sees this and it saves some ants. I guess the lesson here is buy what you can use in a reasonable amount of time.
I should also note that I didn't refrigerate it.
Edited by M_Ants, August 16 2021 - 6:12 PM.