Some people only have the problem when they run water in a sink or a bathtub. The source of the odor in almost all of these instances is a buildup of biofilm on the sides of the pipes that connect the sink or fixture to the actual P-shaped trap under the fixture.
Subsided is defined as  calmed down or sunk to a lower level. When the noise of a crowd dies down, this is an example of when the noisesubsided.
Definitions: 1. Softening by the action of a liquid. 2. Softening of tissues after death by nonputrefactive (sterile) autolysis; seen especially in the stillborn, with detachment of the epidermis. The definition information for maceration is provided by Stedman's.