Loose screen on iPhone 6 64GB

[Ledsteplin]

I've had the exact same issue from the very first day, when i took it to apple care a few days later, the guy took my phone for 5 minutes and came back saying that the screws were loose and he had tightened it now and the clicking had stopped then, but now its been almost 6 months and i can experience more clicking than ever before, not sure if I should go for a replacement

Some rattling can occur around the home button and camera. That's normal. But the screen shouldn't click. I'd take it back to Apple. It's still in warranty.