Use the Phillips #000 Screwdriver to remove the cooling pad screws.

Apply gentle pressure when undoing the screws to preserve the condition of screw heads for future repairs or servicing.

Make sure that the screw pressure across the metal plate remain rather constant. Undo the screws by a couple of rotations each, removing them AT the same time.

Lift the cooling pads and the fan assembly.

Remove the old thermal compound, degrease the surface with rubbing alcohol.

Use a can of compressed air to clean the fan assembly.