There could be there easy to fix problems that cause this. First, there is a small air intake hole on the stainless steel fothing sleeve. It is located about 1/4" blow the top of the sleeve. Locate this hold and clean it out. Second, make sure the center part of the frothing sleeve is pushed all the way down. Use a something such as a chop stick to push it down from the top opening of the frothing sleeve. Third, make sure the wand on the machine is clean so that when the steam exits the machine is comes straight out. If it comes out sideways it will no work properly.