Improve Shopping Lists - Clean Button

When I add multiple recipes to a shopping list, there are a lot of duplicates or uncategorized items. Would it be possible to have a button or functionality that would 'clean' the shopping list? I am aware of the 'Combine shopping list items' feature in this thread that has been implemented, but there are still duplicates when units or recipe languages are different. A functionality like this could be premium, and would really make me consider a subscription. Love the app!