Do not improvise with compressed air unless the manufacturer explicitly permits the exact owner procedure. It can drive fibres into concealed areas instead of removing them.
Understanding this situation
The visible entry point may connect to electrical or delicate components, and a cloud of lint does not show that the whole air path is clean. An open access flap is not general service permission.
A useful next step
Follow the model's filter and cleaning instructions. If lint beyond those areas is suspected, arrange appropriate assessment. Do not run the machine with panels removed to watch where the fibres emerge.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.