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How do you clean dentures?
Are you interested in cleaning them with soap and water? Or with toothpaste? Or in some other way?
This really depends on your specific situation, so let me just summarize a few possibilities.

You may be able to use a denture brush and a bowl of warm water to gently clean the dentures themselves.  Other methods of cleaning dentures involve either using special denture-cleaning tablets or a cleaning solution with a specially-designed brush.