One of the most common problems with flush-mount ceiling lights, and lights where the bulbs are housed behind enclosed glass shades, is what happens when those shades get stuck. This can be a common issue on fixtures where the glass screws directly onto the fixture without hardware. This is especially troublesome when a bulb needs to be replaced, but you are having trouble accessing it. Start by ensuring that your hands are dry, clean, and cool. Using both hands, find a firm grip on either side of the shade and twist it the proper direction, pushing up slightly to help unhook the screws. If the shade still remains stuck, take turns with another person, or do not use the light for a day or so to allow the metal and glass to cool.