I have no idea how insects are dealt with in other countries but here airborne insect sprays are commonly used, so are surface sprays. But have no doubt, my friends, even though they are called "spray" or "insect control system" what you are spraying is poison. They may be low grade poison or "pyre
thrum-based" but consistent use of anything like that may have the potential for harm.
And you should remember that most insects are harmless and life on earth as we know it would be impossible without them.
Now you all know I'm an old granny from way back, so you won't be surprised to know I use a fly swatter for flies and mosquitoes, and for the occasional spider. (While I am writing this a huntsman spider is crawling on the wall in front of me. They are harmless and they eat other spiders and insects.) It is common practice in Australia to have homes routinely sprayed for spiders and other insects. We don't have this done. I would rather live with spiders than poison. We've lived here for 11 years (as of today!) and we don't have a problem with spiders, ants or any other insect. We have insect screens and doors and if something gets in, we either live with it, as in the case of some spiders, or kill it with the swatter.
I use the exclusion method for pantry moths, weevils and those insects we get in grains and cereals. I freeze flour, grains and cereals when I bring them home from the shop to kill any larvae they may develop and infest the pantry or stockpile. After freezing, the food is put into airtight containers. I wipe the pantry shelves frequently.
If the dog, cat or chooks have fleas or lice, we use
diatomaceous earth which is available from garden or produce stores. It works every time.
Be aware that every time you smell something in the air, and even when you don't, there may be chemical compounds around you - especially in a new home or car. That new car smell - that's chemicals. New carpets, plastics, some benchtops, some paints all give off airborne chemicals.
Here is a recipe for milk paint, a better alternative to many commercial paints.
I know there will be times that you might have to use some form of poison in your home but I hope that you know the risks associated with whatever you use. Even seemingly harmless things like deodorants, hairspray, makeup and new clothing may contain compounds that may cause harm. Be aware, read labels, do research and know what you're bringing into your home. Your family's health depends on it.