Do not buy clinical guard!!!

Don't not buy clinical guard hpt or opks. I didn't get a single positive opk all month used a different brand also and got positives right when I should have. Used 2 clinical guard opks with the same sample, not touching dipped for the same 3 seconds. Placed on the same surface and got 2 different results. I got 2 very faint positives on clinical guard hpts. Got my hopes up. Took 3 frers for 3 days and each one bfn. Don't buy clinical guard!