Step 2: Clean the stump
try to use the pliers (or a channel wrench) to unscrew the bulb with the remaining glass. Hold your bowl or box up to catch any glass shards
If you're lucky the bulb stump will come free. if you're unlucky the bulb will be too tight and you will not be able to extricate the threads. In this case use the pliers to break away any glass until you have a clean socket.
Be very careful cleaning the socket. bulb glass is very nasty and likes to splinter into slivers. you should always look away or use eye protection when breaking the glass. also try to hold your container completely over the socket to catch any flying pieces