Need help with reset variables

I am building a program based on forms. I created few forms and declare public variables to calculate price which is displayed when one of that form is load based on values from previous forms.
I will do loop back to first form but when I do that all variables are not resetting.

I done this way:

frm_name.visible = true
me.visible = false

Please give me some advice please.
If somebody is interested I email that program.