Issues with discs reading

I have a og phat 360 it is a falcon board with a date of 06/16/2009 but anywho i am struggling to get it to read games it is hit or miss if it reads it will either go in and read it or it will go in but then say open tray after the laser head moves twice and it is different for every game like sonic 06 it will read first try but then like call of duty it takes me like 8 or so tries before it finally reads it idk if it is a dirty laser or what any help is appreciated