9 Cleaning your meter
Your meter utilizes an optical measuring method that relies heavily on
all of its components being clean. Owing to the way the test strip works,
the meter does not normally come into direct contact with blood. Regu-
lar cleaning is therefore largely unnecessary. You may need to clean the
meter, however, if it becomes soiled through improper use (see error
message E-4 on page 174).
Wipe away any soiling from the case or display with a cloth lightly
moistened with cold water or 70 % ethanol.
Clean the meter thoroughly if the test strip guide and measuring window
have become visibly soiled or if you obtain frequent implausible results.
Do this as follows:
On the right-hand edge of the meter is a small triangle on the measure-
ment optics cover and below it is a recess.