[rules-users] Removing facts from statefulknowledgeSession's memory

[Ayush]

Hi,

In my drools implementation I'm inserting all my facts into working memory
and for every fact received I'm also inserting events into notification
stream. 
Now the StatefulKnowledgeSession I'm using is static and it is neither
initialized nor disposed after being initialized for first time. My
application will run for months without restarting and so the same session
will be used without being reinitialized or disposed.

Do I have to retract events explicitly or will it handled by drools
internally? If not then how can I retract them say after 5 minutes?

Also I'm using sliding window and I've not explicitly declared expiry time,
for events, in my drl file. Should I define it or will drools remove them
after the maximum sliding window time defined in rules?
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