The Instrument Cleaning Solution is specifically formulated to cleanse all the Environ cosmetic needling instruments. 1. Soak instrument in the cleaning solution once a week for 10-15 minutes. 2. After soaking in the solution, rinse well with warm water, rest on a soft surface to dry 3. Once dry replace into the instruments protective container, ready for next use. Please note: Instrument is not to be left in the cleaning solution overnight.