Methods and apparatus for improving printing efficiency are shown and described including recognition of a condition where print head swath height spans successive media including a gap therebetween. The housing has an evaporator opening, and a major through hole communicating the inside of the housing with the outside and having an opening width sharply reducing from wide to narrow in the direction from the bottom end to the top end. It solves the problem that users aren’t accurate about the amount of water to add for a given weight of ingredient. At least one skin temperature sensor is positioned so that it is in contact with the patients skin when the system is attached to the patient.