每年做两件事:

1 get a bottle from HD (looks like dirt) to spread around the house, that keeps crawling bugs from entering the house
2. Use the 9 dollar 6 can bombs, one for each room, around spring time.

If you see ants all the time, most likely there is a leak and rotten wood somewhere in the house, because ants don't really come to your sink or toilet to get their drinking water...

Spiders are there because there are something to eat. I don't mind have some of them there, good to see them busy around making their living.