OPK always duds? ! ?

Andrea • I have accumulated one husband, two sons and two dogs 😊.
Hi, I'm brand new to glow but I have a question. Am I the only one who wastes half or more of the opks in a box? I pee on it and it doesn't work, no lines at all. I've been through 4 boxes with a 60 percent failure rate and I'm losing my mind over it... Thanks for any comments.