I have developed a touch screen stand alone application. The interactive is currently running 10 - 13 hours per day. If the user interacts with interactive the memory level is going on increasing. The interactive has five screens while travelling through each screen I have removed the movieclip, assets, listener's and I set objects to null. Yet the memory level keep increasing.
Also I have used third party tool "gskinner" to solve this problem, It improves the result even though some memory leakage is there.