My scunci steamer will not allow full steam power to come through the nozzle. When the trigger is pulled, there is just a very minimal amount (or none) steam to come through. What is wrong and where can I have it fixed. I havenot used it very long. I kept changing the water and washing out the nozzle, still no steam. I can hear the machine making noise and must let it cool off before opening the top, but no steam will come through.