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Why does the control solution bottle need to be wiped?

April 26, 2017bottle CONTROL solution wiped

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Why does the control solution bottle need to be wiped?

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In the same way that fresh blood should always be used for testing, fresh control solution should be used to prevent a contaminated control drop. Old control solution should always be wiped from the tip of the bottle so that only what is in the bottle itself is used for the test.