Update: Pants had a food oil stain. Tried washing and pretreating, no help. I used Folex cleaner and a sponge then washed it. Before/After : r/CleaningTips
Aera® - Sandalwood & Vanilla Soft Pants Home Fragrance
How to remove oil stain from shirts after being washed and dried already? (97% cotton, 3% elastane) : r/howto