I would think a small fan would work as well. It will keep them out of your taps until you can clear them out. I have made fruit fly traps as well which seem to work pretty good. (I had some bottles that didn't get rinsed I was saving for bottling and ended up with a bunch of them) I took a jar with a metal lid (salsa jar ect) and poked a small hole in it only big enough for the flies to get in, and found this recipe online. Equal parts vinegar and beer, or fruit rind ect.. (something they like) 1 tsp sugar, and a few drops of dawn dishsoap. The trick is to make them want whats in the jar more than your precious homebrew! They crawl in the hole and can't get out. The dishsoap I believe disorients them? It worked well for me and had them cleared up in a few days.