Completely frozen

My phone is completely frozen. I turn it on and can't swipe to unlock. I've tried powering it off but my phone doesn't let me swipe. Basically my phone isn't responding to touch. how could i possibly fix this? i've vacuumed up any moisture out of my phone, it work for a few minutes after then went back to exactly what it was doing. I need help, my parents won't get me a new one. I'm texting through Imac