Hi recently I just repaired my s20 battery but now I'm having a hard time getting the back glass back on, I removed the adhesive and put on one of those 2 pound ebay waterproof green seals on the back glass and stuck it on. However on the sides of the phone I can't seem to get it in all the way and there is a small gap. I want to make sure the phone is sealed properly. How else can I seal it so that the back glass is all the way back in like brand new. And is waterproof resistance completely gone? Is there any way at all I can bring it back? Thanks