I was at my wit's end with the spontaneous fly "situation" that has developed in my place. As a) I live indoors; and b) I have pets, I wanted a solution that was non-toxic and non-horrifically-stinky. I found the answer with these Victor fly ribbons, which even come packaged with a thumbtack for you to use to fasten them to the ceiling.The fly ribbons are ugly as sin--more so when dotted with flies--but they really do work well. I've had great luck trapping both fruit flies and "larger" flies alike. Be careful to avoid touching the sticky ribbon with your hands, as it takes some effort to wash off the goo.