Faythe and I were just talking about this but I'd thought I'd share it with you as well. This Skacel Meditation yarn smells like lavender for at least 40 washes, so says the manufacturer.
If I find it, I'm going to try it out. Maybe make something that doesn't require so many washes so it'll last a while.
Lesson learned today: Do not overindulge on sugar-free sorbitol sweetened mints.