When I was very little, the bathroom in my house had a small plastic earwax irrigator in the cupboard below the sink. I did not know what it was, and my parents wouldn't give me an explanation beyond "leave that alone and dont't play with it." One day curiosity got the better of me and I have it a squeeze. Well, it wasn't empty. A while bunch of ants came out. Good thing no one tried to actually use it.