Discount Element Problem/Clearing Cache

Currently at my checkout page on my ecommerce site ,I have a discount element which users can see only when they are logged in.When I firstly logged in , I entered a promocode and it automaticly calculates the discount.Then when I log out or refresh the site the calculation stays always there.So my browser remembers it.I would like to have once I refreshed/logged out the page the calculated discount amount shouldn’t be there anymore.Also the datas as “Name”,“Email” an user should input for checkout, stays there still after refreshing or logging out.What’s the best solution I can achieve with webflow or maybe custom code.

Here is my site Read-Only:Webflow - Blanccoeur