2 days ago I talked to a guy who said he just uses smooth plastic bottles for those roach traps, with some water inside and maybe something that smells like food.
A lot of online how-tos recommend the drop of dish soap. I personally never got it to work, I think it blocked the smell of the vinegar and flies didn't even come close. When I tried the vinegar on its own, they flew right in and drowned in it.
2 days ago I talked to a guy who said he just uses smooth plastic bottles for those roach traps, with some water inside and maybe something that smells like food.
A lot of online how-tos recommend the drop of dish soap. I personally never got it to work, I think it blocked the smell of the vinegar and flies didn't even come close. When I tried the vinegar on its own, they flew right in and drowned in it.