Take the FEATHER DUSTER (E).
Note the Mechanical Wall (F).
Walk forward (G).
Take the SPRAY HEAD (H).
Take the WOODEN CANE and the PICKAXE (I).
Walk down and look at the Mechanical Wall.
Use the SPRAY HEAD on the bottle to get the MOSS KILLER (J).
Pull down the ladder with the WOODEN CANE (K).
Take the SHARP ROCK (L).
Exit the close-up; walk forward.