is it me or the product

I ordered the three pack. I put the first screen cover on my phone and within two days it was not sticking to the right side of the phone in the upper corner. The spot kept getting bigger and after three weeks i took it off and used a second screen protector. Same thing happened within days of putting it on. I gave my husband the third and his is doing the exact same thing in the same area..... I have used many screen protectors and have not had this happen before. (i even used the plastic placement guide that comes with the protectors to install it. So is it me or the proctor??? Not sure. I am going to try a different brand and see how that goes.

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