How do I know if my screen is cracked or if it's my screen protector?

Dropped my phone and have two thin hairline cracks on my phone, how do I know if its my screen protector that's cracked (its glass) or the screen its self?

I don't wanna take it off because I dont have a spare.

Thanks.

Submitted September 24, 2016 at 12:19AM by AsRiversRunRed http://ift.tt/2cNiPUs via TikTokTikk