| abstract |
(57) [Abstract] [Problem] To exhibit high detergency against all types of dirt, and to prevent oxidation deterioration at high temperatures such as during steam cleaning, and have low toxicity, and material stability against the object to be washed. Provided is a cleaning agent having high flammability, low flammability, and no risk of destruction of the ozone layer, and a cleaning method and a cleaning apparatus suitable for the cleaning agent. SOLUTION: Methyl perfluorobutyl ether and / or methyl perfluoroisobutyl ether are One or more compounds selected from glycol ethers are added, and glycol ether acetates, hydroxycarboxylic acid esters and the like are further added. |