get rid of obnoxious icon on desktop

[Pie_Lover]

Normally, when I drag a desktop icon down into the thrash can it will erse the icon.
With the facebook icon I can drag it down as far as it can go, but the Dock images at the bottom do not come up, therefore I can not reach the Thrashcan.
Does this describe my problem well enough? Do yo still need a snapshot of the icon? It is just a plain ,very translucent "f"

Where exactly is the icon??

 

[Stretch]

Where exactly is the icon??

Please go back and read the rest of the thread.