Unwrap the Canestest swab (make sure the swab tip does not come into contact with anything before you insert it into your vagina). Hold the Canestest swab by the handle and insert the yellow tip into your vagina, rotate the swab and then remove. After 10 seconds check the tip of the Canestest swab to see if the colour has stayed the same or changed to blue or green. To get the most accurate results you need to make sure you don’t use Canestest less than one day before or after your period or if you have any signs of your period or vaginal bleeding. You also need to allow 12 hours after having sexual or vaginal douching.