Clear blue digital opk

So I have been using two different ovulation tests to detect my peak, with the strips I use I tend to find that I am picking it up and having no problems, I also think I’m definitely ovulating as I’m getting little symptoms like the egg white mucus and I do get little one-sided pinching cramps leading up to it as well. However when I use a clear blue digital it’s coming back as negative every time. Has anyone else ever had this issue and do I have anything to worry about? Is it likely just to be a problem with the digital and is it worth me getting a new one or?