Possible answers:
a). There are 2 options for lights to remove: alcohol-based lamps, and soft light bulbs. Avoid drinking too much beer with any of the light fixtures removed.
b). You can also try unplugging the power when the bulbs are cool. Place the glass vase into an unventilated area to observe it.
c). You can disconnect the electricity as an extra precaution, but only do this if you are confident in operating your home's circuit breaker or have assistance from a knowledgeable electrician. You should not need to adjust any electric wiring in this process.
d). Measure the circumference of the chandelier and its diameter. Size is very important if you are cleaning a chandelier that weighs hundreds of loads or larger.Choose from options above and answer: What most naturally follows?

How to clean a crystal chandelier
Turn the light off and let the bulbs cool.
Switch off the light switch that controls the power for your chandelier. Wait until the light bulbs on your fixture feel cool to the touch.
Answer:
c).