Replace the steam valve mechanism for the wand with a new one. Some people have suggested that you can just clean the mechanism and reverse the seals but whilst this may work for a while, the ball in the mechanism gets pitted and rough and will never seal like a new ball. The mechanism is around $60 Aust. The hardest part of the job is probably getting the plastic cover off to get to the screw to take the handle off. I suggest cutting two 10mm strips from a credit card. Then insert these in the gap between the handle and the plastic cover. You will need a sharp blade to spread the plastic a little the get the credit card in on BOTH sides of the handle. Once you do this the plastic cover will pull off easy. There is enough room between the plastic and body of the machine (spreading the plastic apart about 0.8mm each side to make it slip of easy. You will also need an O ring kit as you will need to replace red O rings. For those that have leaking/dripping out of the descaling ports, many suggest to tighten...