NOTHING!!!!
I just escaped yesterday no less a house I was stuck living in for 6 months that was riddled with mold, meth stained walls and infested with rats underneath the house in a valley adjacent to a highly stopped traffic city artery that pumped gas and diesel fumes into the house twice a day during rush hour traffic.
So to be gone from a smell that evolved and became resistant quicker than Borg shielding is an absolute joy!