Should I close the ChannelFactory after each call to web server?

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WCF

WCFServices

I have a client application that is going to be running in the backround, all the time. It pings the database every 5 to 60 minutes to check for new incidents being logged. When the application starts it runs this code and the channel factory will never close until the user terminates the apllication.
I don't see any open/close extensions for the channel that is created. I have noticed other examples on the web use the ClientBased object which discusses cache, has open/close methods, etc. but I haven't read enough on them to sink in yet. Would this be ok to just leave as is?

myChannelFactory = New ServiceModel.ChannelFactory(Of IncedentScratch.IIncidentNotifications)(myWSHttpBinding, endPointAddress)

'create a single channel
Dim incidentService As IncedentScratch.IIncidentNotifications
incidentService = myChannelFactory.CreateChannel()