Purchase a denture cleaning product designed to soak dentures. Efferdent and retainer brite has been tested by consumers and has received favorable results.
Soak your aligners using one tablet of the denture cleaner in the morning and one tablet in the evening. It is recommended that you soak the aligners for approximately 10 minutes in cold water.Brush aligners with a soft child's toothbrush after you soak them to remove any cleaner particles that remain and rinse thoroughly.

N.B NEVER USE HOT WATER.