aroma booster

Aroma boosters are sold primarily as scented in‑wash beads and as liquid products — including liquid laundry additives and room sprays.

Bead‑style scent boosters are added directly to the empty washer drum before loading clothes. Liquid boosters are measured (often by capful) and added with detergent for regular loads or used as a presoak treatment.

Many in‑wash beads are described as fabric deodorizers or as using "odor‑blocker" technology. Some liquid boosters emphasize added odor‑fighting ingredients and stain‑and‑odor fighting formulations to tackle smells during washing.

Many in‑wash scent beads and liquid boosters are formulated for HE use and state compatibility with HE machines. At least one product explicitly notes it works with both high‑efficiency and traditional washers.