Make a decision
Cabinet wipe versus combustion service
One scope
A cabinet wipe removes visible dust in accessible non-fuel areas.
The other scope
Combustion service assesses burners, ignition, heat exchanger and venting by a qualified gas technician.
A concrete example
A clean exterior panel is visible to anyone. A claim about safe ignition or venting requires appropriate trained inspection and a record, not the appearance of the cabinet.
Which question settles it?
Do not accept a wipe-down receipt as evidence that gas safety was examined.