Steradent All in 1 Active Fresh improved formula activates thousands of micro bubbles that carry the active oxygen all around the denture, providing a powerful in-depth clean working where the toothbrush can't go - leaves your dentures feeling perfectly smooth and clean. Steradent All in 1 Active Fresh is effective in 10 minutes, killing 99.9% of bacteria. With eucalyptus and menthol for daily fresh breath, use twice daily for the feeling of perfectly smooth and clean dentures. Suitable for cleaning both full and partial dentures. Safe for metal parts and will not cause corrosion.