How to replace microwave lamp???

The light in the microwave stopped working. Have tried unscrewing and also pushing up and turning, from inside the microwave where the tip of the light is located, but it doesn’t come out. Have tried not to force it, since I don’t want to break anything. There aren’t any instructions in the manual covering this.

What is involved in replacing the lamp? Can it be bought at most appliance dealers?

Thanks, Richard :confused: