can you interpret my dream?
The glass is used to protect the high polished surface of the mirror. Silver and other reflective materials can be easily tarnished, and since they are high polished smooth surfaces scratching can also be a problem.
Spiders are not attracted to anything, and unless the spider has a rout of escape, you can often coax them out of hiding with a cold hair dryer. The wind irritates the hairs on their legs.