Drupal ubercart limited time offer

I am developing a web site with Drupal + Ubercart. I am using limited time offer module it works perfectly but when I add some product to cart before expiration time that product remains in the cart even it expires later. I think I have to use a trigger to make product removed from cart 开发者_如何学JAVAafter expiration but I don't know how to do that. Anyone has an idea?

In Ubercart's settings there is an option to control how long a cart is remembered. You could probably shorten that to less than a day and it should solve your problem.