Did you read the above posts??? Can't get any more clear than that. Look at the pics, locate that screw. Remove that cover. Use your vacuum if you have a hose attachment, and a can of compressed air. Hold the vacuum hose right over that area and use the compressed air to break the dust blobs loose.
60" Panasonic Plasma ~ BenQ HT1075 / 92" fixed Dragonfly Screen ~ Parasound Halo C2 Pre/Pro
Earthquake Sound Cinenova Grande Amplifier ~ Crown X1000 ~ Oppo BDP-103
Musical Fidelity Tri-Vista Tube DAC ~ Monster Cable Signature Series HTPS7000
Energy Veritas 2.2i (mains) & Veritas 2.0c (center) ~ CAT Tiburons (surrounds)
Energy E-XL15s ~ Sub... custom 15" Diamond Audio Technology ~ Xbox One & PS3