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Title:	Endoscope cleaning powder vs liquid
Problem:	Guidelines for endoscope cleaning require the use of an enzyme cleaner to soak the instrument. How can I be sure the enzyme is still active in my cleaner?
Solution:	You can use a liquid or powder enzyme cleaner. Liquid enzyme cleaners are thought to be easier to handle, dissolve and dose. The problem with liquid enzyme cleaners is that the enzyme is active in the liquid state – the enzyme eats itself, thereby causing the cleaner formulator to use excess expensive enzyme and more expensive ingredients to stabilize the enzyme in order to get any kind of useful shelf life. Extra care in the storage and handling conditions with shelf life monitoring may be required with liquid enzyme cleaners. Powdered enzyme cleaners such as TERG-A-ZYME are highly stable in the powder state and only become active when dissolved in solution. This also results in a substantially more economical cleaner. With TERG-A-ZYME you add 1 ¼ oz. to a warm water solution and soak instruments for 20 minutes followed by a thorough rinse.