We grow up in the same environment until I was 16 in China in 1978. During the summer, DDT was frequently sprayedd in our home(bedroom, kitchen,..). Doors and windows would be closed for about 45 minutes. Then we would open the window for some minutes before going in. I recall, the rooms were stil full of strong DDT smell, yet we went to bed to sleep.
Further, my dad grew grapes in the yard right in front of the door. Frequently he had to spay pesticide on the grape vine. I remember having to hold my nose in the house when the spraying was going on. My brother, as a teenager, helped him spraying sometimes. After a few days, we would pick the grapes to eat. I don’t recall we washed the grapes because they looked so “clean.”