It wasn’t easy. I learned the hard way by dropping down the entire fixture; then learned how it was setup. See pics below.
The glass cover to the fixture, however, “CAN” be removed without dropping down the whole fixture. I learned to spray some WD-40 into the fixture and glass to make it a little easier.
I used some “non-skid” drawer lining to get a better grip. Use the palm of your hand (or thumb and forefinger) to turn “counterclockwise” as you’re looking up at the fixture. It’s “kinda tough” to get traction and get it going, but it does work. The glass is thick, so I don’t think the glass will break if you don’t exert heavy upward pressure; just firm pressure turning counterclockwise. Once the glass comes out, you can pull out and replace the spent bulb.
As shown in the pics, the glass cover has two opposing indentations that fit into the two neoprene clips in the fixture. Turn clockwise to re-attach. I put some white grease on the glass cover edge to assist when there is “a next time”.
If you do drop down the whole fixture, just take out the bulb holder attached to the white wire in the first picture below.
Hope this helps.
Pete and Patty
2010 Georgetown 378TS; 2012 4dr Jeep Rubicon
1 Yellow Lab (hers);1 Little Bitty dog (mine)