Guitar - Ibanez RG5EX1
Tremolo - Edge III

Hi, for some reason my tremolo keeps on turning backwards (side furthest away from pickups goes down) on me, causing me to constantly have to loosen the strings on my guitar and I have to keep on taking it to a guitar specialist (which I have to pay...) to readjust the tremolo. How am I supposed to fix the tremolo so it doesn't keep turning on me? Also, how do I make it flush? I'm pretty sure that I am supposed to turn the screws on the back inside of the guitar, but which way do i turn them?