Well scents do go bad, but at the same time, its as possible as anything, he smelled you too
spray down or not, human scent can happen, and spook a deer thermals heat temp changes can send scent in many directions

Then again, any new scent to an area can get a deer on high alert and cause them to leave or stay out of an area
all deer react differently
so even if good scent, not bad/spoiled
can spook a deer
also why I tend to use less if any at all any more
its all a roll of the dice if you ask me, seen it spook deer, seen it bring em in
out of same bottle same day???