ELECTRIC GUITAR bridge WITH TREMELO LIFTING UP   I Bought an Ibanez guitar about a year and a half ago and the bridge , which is connected to the guitar by three springs, has begun to rise up. I thought the cause might be the strings so I changed them, but the bridge only raised up more. What can I do about the problem?    
Tremolo springs flex out over time and need to be replaced. Many tremolo springs, though, are attached to a "claw" ( most Strats ,and many others, have this ) and the claw can be tightened to increase tension on the springs. The "claw" has two screws that are seated into the body of the guitar. Here is the professional way to set the tension on the tremolo springs : Loosen the strings till the bridge sits parallel to the top of the body. Place a block of wood which just wedges in between the back of the tremolo block ( inside the routed-out cavity in the back of the guitar) and the inside wall of the tremolo block cavity. This will hold the bridge in place as you bring the strings up to concert pitch ( or whatever tuning you use) . Always have the gauge of strings you intend to use on the guitar when you make this adjustment Tighten the screws that hold the "claw" evenly a couple of turns ( don't force them if they don't want to go in ) each until the wooden wedge just slides out. This is the correct setting for the tension of the springs. If you can't get enough tension after tightening the screws, you must replace the springs. Changing string gauge will , because of the change in tension, affect the setting of the springs. This adjustment must be made again if you change string gauge.