Mind Games

Those darn Carolina Wrens are playing games with my mind.  How?  At one stroke, they (I assume) cleaned out the bird bottle over the garage: there's a small pile of vegetation scraps below.  And the bottle looks empty.  This would assume someone wants to fit the thing out in their style.  But at the same time I have been catching wrens poking around the interior of the garage as they do every year.  So what is it? bottle or not?  This could get interesting.  I will win the garage battle simply by closing the door more frequently.  Will they accept the bird bottle---my perennial too-often-loser nest option?  We shall see.