Turn off the mains supply. Do not try to replace the bulb unless it has completely cooled down as it may cause serious burns on the skin.
Always use clean protective gloves when handling a light bulb.
Use a clean tower to clean the bulb in case you touch it accidentally.
When replacing the bulb, twist it very carefully while it is still in the socket.
Before feeding again with electricity, replace the bulb’s cover to maintain the impermeability of the fixture.
Please recycle the old light bulb.