how to clear variable

hay I have GUI code that extract 5 diffrent values from diffrent GUI in matlab using getappdata and setappdata. it works fine at the first time but when i use the gui again its show the variable from the first use. how can i "restart" the values every time i use GUI? i used clear and clearvars but it dont work.
thank you all!

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on 26 May 2017

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