Troubleshooting My Philips iron is leaking from the Easy De-Calc knob If your steam generator iron is leaking from the Easy De-calc knob, there may be various possible causes. Find out how to resolve this here. The rinsing knob is not tightened sufficiently or correctly If the rinsing knob is not properly tightened, water leakage could occur. In order to solve this, please switch off the power and ensure that the steam generator has cooled down sufficiently. Then, make sure the knob is correctly inserted and tightened. If this can't be achieved (the knob is defective), then we recommend that you contact us. Some water may have collected around the rinsing knob after filling This water is converted into steam when the steam generator is hot and this may cause some leaking when it cools down. The leaking will stop after a few minutes when the water has dried up.