Clearblue advance

I haven’t used those before but I have read from girls on here that you’re not supposed to look at the stick, just go by what it reads digitally

I recommend always double checking w/ cheap opk. Once you get a flashing smiley you want to re-do it in the evening so you don't miss your surge. (I personally have always got my solid smiley in the PM)

It's states right on the instructions that the lines don't matter

My sticks when I am ovulating are the same as the strip OPKS. My test lines are always darker than the control lines. I know people say you can't read them, but I can always read mine.