  Superconductivity in polycrystalline Fe1+dTe0.9Se0.1 was enhanced by heating
in alcoholic beverages. We found that part of the excess Fe was deintercalated
from the interlayer sites by the treatment and the shielding volume fractions
were increased with the reduction of excess Fe content in sample. This behavior
is similar to the case of Fe1+dTe1-xSx. Thus the technique of alcoholic
beverage treatment can be applied generally to the Fe-chalcogenide
superconductors.

Superconductivity