The diabetest test strip needs to be fully inserted prior to placing the drop of blood on the strip.
Placing too little blood can cause a screen to read "error" or give a lower number than your actual number.
Placing too much blood on the strip may also result in "error" on the screen and wasting an additional strip.
Having a battery that goes dead during the glucose test. Batteries last up to 2 years and can easily be replaced. The meter usually indicates when the battery power is low.
Removing glucose strips from the original container and placing them in your pocket, wallet or meter case for convenience, this will make the strips inaccurate.
Avoid strips encountering dirt, water, crumbs, soap, lotion, food or vitamins.
Trying to reuse a test strip you will get inaccurate results since there is only enough enzyme for one test.