I recently moved into a new rental house, and we have a porch light by the front door. It hasn't worked since we moved in, so I'd like to replace the light bulb which is completely enclosed by a glass cover, as shown below.
I'm assuming that the cover should unscrew, but try as I might (even wearing rubberised gloves for extra grip) I've not been able to remove it. I don't want to use excessive force, for fear of breaking the light fitting.
Can anyone suggest how I might remove the cover?