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.
The definition of dissipated is scattered or wasted. When a smell was really strong but now it has started to fade and is no longer really there, this is an example of when the smell has dissipated. 1  scattered. 2  squandered or wasted. 3  characterized by, or showing the harmful effects of, dissipation.