clear form without clear session

Hi;
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I am using 3 form in connectivity 6 which are nested each other. When I want to use same form again, It filled by before inputed datas. I am using {fn:save_to_session}. I know that {session/clear:save_to_session} code. But it is not suitable for me. Because if I use {session/clear:save_to_session} then I can not pass a data to other table.
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How can I clear all of form fields without use {session/clear:save_to_session} ?
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Thank you