Dust, smoke and salt leave residues that keep working over time
Dust and residues are not only cosmetic. They can accumulate in gaps, fans, potentiometers, faders, mechanisms and connectors.
Smoke, aerosols and marine environments can leave harder-to-remove deposits and encourage corrosion or sticky surfaces. After use in demanding environments, careful external cleaning and inspection of exposed points is more useful than waiting for an annual service.
Do not blow contamination deeper into equipment or spray products into controls without a procedure suitable for that component.