There's a lot more action on the Office Lever page (vs the Office Lever Plus) so I'm re-asking my question here too...
I've had an Office Lever Plus for about 3.5 years and it's great. I've never descaled the boiler or had it serviced. I'm noticing over the last few months that a lot more water is trickling out of the little "release valve" when a shot is pulling (as opposed to an occasional trickle). Is that valve failing? Should I do anything to descale the boiler?