A tool safe for an external grille may be unsuitable for delicate mesh, fins or sensor surfaces. Access and material matter as much as visible dirt.
Understanding this situation
Long brushes and pressure sprays can move debris into concealed spaces or damage components. Marketing a tool for appliances does not establish permission to use it anywhere in a particular dryer.
A useful next step
Use the specified gentle owner-care methods only with the appliance safe. Stop where cover removal or force is required. Persistent restricted performance after proper maintenance needs assessment, not a larger or sharper cleaning tool.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.