Insect zapping gadgets

[Trooperman]

Seems to be a plague of very annoying flies around at the moment.
Has anyone got an exterior "Insectocutor" that works?....and that, thus, can be recommended?
I've tried a chinese cheapie that does kill whatever lands on the enticing light, but which is ignored by the flies that still want to land on me!
I suppose one ought to be aware, as well, of erroneously killing off beneficial insects. So what's the best FLY killer in your experience, please?

[dxf]

Hola

There are repellents; Halley from the farmacia is my favourite but most people like Deet based products

Davexf

[El Cid]

We suffer from flies in the kitchen from time to time. I’ve tried most things and found that old fashioned fly papers work well.. Very cheap at your local ferretería.

Sid