I’m wearing new pajamas. They’ve been washed once and febreezed twice. They still have that weird, unpleasant, stale odor that sometimes accompanies new clothes. I had a pair of jeans that took *months* to get it out (although near the end I think only I could smell it). What the hell is this, and how can I make it go away faster?

UPDATE: I washed the offending pj’s with a few misc items (cuz I won’t do just two things in a load) with a scoop of Oxy and a half cup of white vinegar. Also I used warm instead of hot bc I almost never use hot. I’m always afraid of shrinking stuff. Anyway, the smell is 99% gone, maybe only still in the waistband or my imagination. THANKS GT!