I've had this RG370 for like 3 weeks and twice i've changed strings(my guitar teacher did)and i was wondering when tuning,it keeps dropping way outta tune,i forgot how to combat this.help please!!!
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60th anniversery American strat
Ibanez RG 370
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Floating bridges work on this simple concept:

String tension is balanced spring tension

If you change a string's tension, the spring will react accordingly. So tune a string down, and all the others will go sharp.
If you use the same string gauge/brand, put something under the Floyd so it doesn't blemish the finish and don't mess with the springs. Just restring one by one or alltogether, depending on which you favor.