We just put the Air Con on, and we have plug-in's that emit a high pitched noise that the mozzies don't like.
Simkov contains Deet as do the room sprays. Personally, I don't want it absorbed into my skin and I don't want to inhale it either. Have to say, touch wood, we have never been bothered with mozzies in the house, but we do have screens on all the windows.