Top blood sugar watches online provider: The following quality control tests can assure you that your meter is working properly: Test using a control solution. Follow your typical blood-testing procedure, but use a liquid control solution instead of blood. These solutions usually come with your monitor and are available at most drugstores and pharmacies. Follow package directions. Use liquid control solutions every time you open a new container of test strips, and then use the solutions occasionally as you use the strips. You generally should also use liquid control solutions…