You need a couple of geckos..

running free in the house.. They will keep the house insect free.. I have a couple of big ones (5-6 inches including tails) I see nightly outside the front porch area during spring, summer, and fall.. There are several smaller ones inside the house (1.5 inches, maybe) doing their thing.. Other than the wasps and flies that fly in the back door that I shoot down with rubber bands within minutes, I have seen no other insects inside the house in decades..

You might think its weird to have geckos running around freely inside your house, but honestly I've seen them less than 10 times in 30 years. I don't kill them because I'd rather have geckos in the house over spiders, scorpions and roaches.. I have never seen a roach in my house lol... Unfortunately either Torrie or Lucie (my former Beagles) found one and mangled him and left him to die.. The Beagles "William Wallace'd" him - pulled his guts out and removed an arm and his tail.. I had to put him out of his misery, which I hated doing.. From then on Torrie and Lucie were known as "The Gecko Killers"..

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Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..