Man I had a dream that I created a new product line. Diffusion pockets. Essentially you dip mini fragrance sticks into essential oils and keep them on your keys (wallet was my dream but practically keys are better). Your body heat in a pocket allows the diffusion to happen without the fragrance coming into contact with skin. So you get a subtle good smelling scent diffused to when you put your keys in your pocket. Better than perfumed laundry detergent since that’s all over your skin. Better than perfume over your clothes because there’s less heat activation. This is probably too niche to be a real problem but I’m pleasantly surprised at the thought experiment in my dream :p