I want to offer a one-time discount offer for my product on sign up to my newsletter. If people pass on the offer, then they pay more later.
In my product inventory, I've set up two identical products but with different prices. I use a different button code on my one-time offer page.
The problem I have is when people click on the oto, open an iframe, and choose not to buy immediately. If they later click on an ADD TO CART button elsewhere on the site, then the shopping cart shows two products, the discounted and the full price ones.
Is there any way to automatically clear the contents of the cart on closing it?