I do not like sprays and wonder if they are more harmful than the insects in some cases. I use insense or mossie coils outdoors to deter mosquitoes. I swat flies or open the windows and turn on the fan encouraging them to leave. I had a beautiful big spider web outside my kitchen window. The web glowed golden in the sunlight. I was happy to send flies that way. I use baits for cockroaches. We have a lot of ghekos so they keep the insect population in check also.