A composition comprising surfactant, structuring agent, glycerin, and a silica particle that disintegrates during use. Also, a method comprising applying the composition to hands; rubbing the hands together until a sensory change detectable to the hands is perceived; and rinsing the hands with water. The composition provides a signal to a user to continue washing for a sufficient time. This silica particle disintegrates to a size that is not felt by a user, and this indicates to the user that there has been a sufficient time for washing.