ACCU-CHEK Instant S Control Solution Box/2

ACCU-CHEK Instant S Control Solution

You should perform a control test when: 

• you open a new test strip box.
• you left the test strip container open.
• the test strips were stored in extreme temperatures, humidity, or both.
• you dropped the meter.
• your test result does not match how you feel.
• you want to check if you are performing the test correctly.