Question

I have a Cramer gas hob and one of the burners goes out every time you let go of the knob no matter how long you hold it in?

Answer

This will either be a problem with the thermocouple or the thermo magnet, if this happens it is usually the thermocouple so that is the bit to replace first. In order to supply a spare I will need to know which model hob you have. As with all gas appliances this would need to be repaired by a competent person