Replacement Reed Diffuser Sticks Every reed diffuser eventually needs a refresh. Over time diffuser reeds absorb fragrance oil, dust, and buildup that slows down scent throw. Swapping them out with a fresh reed is the easiest way to bring your diffuser back to life. Pick up as many as you need - whether you want to add more reeds for a stronger scent throw or simply replace ones that have dried out. Available individually at $1 each in brown or tan so you only buy what you need and can match your existing diffuser setup. A few tips: Flip your reeds for maximum scent throw. The more reeds you use, the stronger the fragrance and the faster the oil is used up. Start with 3-4 reeds and adjust from there.