Additionally it does not deteriorate combustion stability significantly. Professional relations deteriorate rapidly between them as well. Opened vermouth, however, will gradually deteriorate over time. John's situation began to deteriorate rapidly. He began to deteriorate rapidly with diarrhoea and madness. Once the salmon have spawned, most of them deteriorate rapidly and die. Roof shingles may deteriorate faster and need to repel more water than wall shingles. Jones' health began to deteriorate severely. The adhesive pads will then eventually deteriorate and release their grip. Analog tape may deteriorate due to sticky shed syndrome. Nitrate film, when improperly stored, can deteriorate into an extremely flammable condition and combust. However, bicuspid valves are more likely to deteriorate and later fail. Gums deteriorate and bleed, with loss of teeth; skin discolors, and wounds do not heal. In time, oils deteriorate and become stale. In "Dune II", all buildings would deteriorate regardless, but the concrete foundations slowed the process.