Our coffee machine at work has a filter. If we set the water hardness to the actual value of our water, it needs replacing quite often. So I've dialed it down a

Our coffee machine at work has a filter. If we set the water hardness to the actual value of our water, it needs replacing quite often. So I've dialed it down and the filters last significantly longer. When we got it serviced last time I asked the technician to look if it needed descaling - it was squeaking clean inside the boiler, so I've dialed it down even more.