I have no idea what has invaded my shower. I am a very clean housekeeper so this little bug has nothing to do with an unclean environment. I live on a lake and maybe that has something to do with it. Well, here goes the description. It is a very, very small black wormlike bug not even a 1/2″ long and about as big around as mechanical pencil lead. It gets into the edge of the shower and digs into the grout. I can pour clorox in the shower and they come out and die. If you do not kill all of them you will see a fat black knat like fly with big wings a few weeks later. I had the shower taken down and the shower pan liner replaced. Nothing was in that area. I am constantly pouring clorox and killing thesethings but will still see the knat and worm like bugs. I also have to replace the caulking in the shower frequently because they dig into it and using the clorox also eats it away.
Do you have any idea what I have and how to get rid of it?
You have bathroom flies, Clogmia albipunctata, which belong to the family of Moth Flies, Psychodidae. You have it exactly right. The larval form lives in the organic muck which forms inside the drains, and the fact that you live so closely to a lake probably compounds your situation since they will also enter the home from the outside where they live in shallow pools and tree holes. Thoroughly cleaning your plumbing might help, but as long as you continue to kill the individuals you are finding, you will help to control the population.