Result from yesterday still appear the next day on digital test

Thanks for sharing your results with Clearblue Advanced Digital Ovulation Tests, Khanh.  Peak Fertility, which is indicated by a solid smiley, is designed to remain on the screen for 48 hours as a reminder that this is your most fertile time.  Once you see Peak Fertility, have intercourse at any time within the next 48 hours to maximize your chances of conceiving.  It's not necessary to continue testing after you've seen Peak Fertility, and it's not possible to perform another test while a result is still on the screen.  

After 48 hours, the screen will clear and your digital holder & any remaining test sticks can be saved for use in a future cycle.  We hope this information is helpful!