BOOMBA inserts are reusable up to 40 times. Preparation is key! Before using BOOMBA inserts, please ensure breasts are clean and dry. Any makeup, oil, lotion or other body products may hinder the inserts from sticking onto your skin properly. To prolong the life of your inserts, it is important to clean and reapply the protective films immediately after each wear to prevent dust and lint from sticking to it.