under one's nose
Right there, in plain view, as in Your keys are on the table, right under your nose. This expression is generally a reminder that something one cannot find is actually there. [c. 1600]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.