To remove items from your subscription you can simply go to your Subscription page and remove the products you want.
To add products to your current subscription simple repeat the same process used for creating your subscription. Add the products you want to your cart, tick the checkbox 'Add to subscription' and proceed. (If you're not logged in, the checkbox will say 'Subscribe and save 5%'. You can tick this and we'll ask you to login in the next step).
These products are now automatically added to your current subscription. We will always redirect you to your Subscription page after adding new products to show you the new updated overview of your current subscription box.