I had those things really bad this year in my seedling cups when they were inside. Thousands of them flying around the house.
I took Neem oil and filled water bottle caps and put them around the seedling cups. They quickly filled with dead gnats. I also tried apple cider vinegar and a little dish soap. That killed them to, but I think the Neem actually attracted more to their deaths.
I took Neem oil and filled water bottle caps and put them around the seedling cups. They quickly filled with dead gnats. I also tried apple cider vinegar and a little dish soap. That killed them to, but I think the Neem actually attracted more to their deaths.