You notice.

They mostly come at night and are around sometimes during the day. They have even come to me while I'm asleep on the couch and my mother is in the kitchen only a few feet away. As long as they can have a moment to do what they have to do. I don't really feel them anymore, but I know they're there. there is nothing you can do about it. You have to understand that they are around you all the time. I know this because after dealing with them for so long you appreciate when they are not.