Isi cream whipper head valve sticks open I have an isi 1/2 liter cream whipper which I purchased in 2010. It has worked well until recently when the head valve began sticking open. I purchased a new head valve, but the problem remains. It has been thoroughly cleaned and also has a new lid gasket.
I tried to use it today for the first time with the new valve. When I first dispensed some cream, it seemed fine, but when I released the lever, cream continued to ooze out. The valve was not returning to the closed position. This is what it was doing with the old valve. Any suggestions?
Have you disassembled and cleaned it? The valve comes apart. A small brush (which comes with a new whipper) can be used to clean the inside. Make sure the o-rings are clean and viable. Make sure you reassemble securely.  The head needs regular cleaning for proper functioning.