there are a couple of ways to clear the text boxes on a form,
This is in Visual Basic and im not completely if it will work for the form as i haven't had the chance to use it
textbox1.cls
textbox2.cls
textbox3.cls
etc using all the names of text boxes that you would like to use
or you can do this
textbox1.text = ""
textbox2.text = ""
textbox3.text = ""
etc