I'm not into murder but I draw the line at wasps' nests on my balcony.

I got well and truly stung last year when I wiped round the edge of the table on the balcony not realising there was a nest underneath. The wasps didn't like being disturbed and showed their anger quite clearly.

My solution:
Buy wasp spray from a Drogerie. (probably Migros has a similar one)
Wait until wasps are in nest. (early morning or late evening).
Keep husband out of the way if he is allergic to stings.
Follow instructions given on the spray.
Go away.
Come back and vacuum or sweep up bodies.
Get praise from husband.

Good luck.