Remove your dentures to sleep to rest your mouth and let your gums breathe. Soak them overnight in warm water with or without denture cleaner. If your dentures have metal hooks, just dip them in warm water and a suitable cleaning agent, as other substances may tarnish the metal. When you do not wear your prostheses, keep them in the water to prevent drying out and never put them in bleach, as they may discolor and poison you.