Two days ago I saw a small spot on the wall leading to the second floor of my house.  I thought my son spilled a drink or something. Yesterday it appeared to be opaque and shiny.  I scratched a portion with my fingernail and assured myself it was just dried beverage and I would have my son clean it.  This morning, the spot has small white open eggs and lots of brown larvae with squirming around.  The appear to be about the size of maggots.  The wall is intact behind it so no leaks etc..  Help!!!