Alarm Pipeline

Greetings All
I have an SMS Alarm Pipeline with a large number of entries.
This was caused by incorrect config of user’s SMS contact number.
Does anyone know how I can remove the entries from the Alarm Pipeline ?
Also, other than going to the Gateway & looking at each pipeline routinely, how do I monitor the Alarm Pipeline in my runtime system so this does not happen again ?

Thanks & regards
Steve Hargraves