First of all: Those things work really well. We have the sticker for about two weeks in use and one-half of all black midges. We underestimated how many mosquitoes are actually on the road and how many to come every day, even if you see laying around only 5 pieces. Since these things are in use, the "midge emergence" has reduced by 90%. What one has to be clear, however, is that the stickers while fighting the consequences, but not the cause of the mosquitoes. You catch the mosquitoes from the air, but do not prevent hatch constantly new. In this respect, the stickers do not solve problems, but only insulate the flying population.
We are therefore to look for an alternative solution. However, the sticker, considered function properly.