When you open Prime Video on your PC and Android devices, you can see the “Watch Next TV & Movies” section in the “Home.”
This section shows TV shows and movies which are the recommendations, the ones from your Watchlist, the ones you have finished watching and the ones you have watched but not finished.
If you want to remove an item from OR entire Watch Next, then here are the steps (keep in mind that the changes you made will apply to your account. For instance: if you remove an item on Android, then you can see the changes on PC too):
Open Prime Video website. Sign in, if not already.
Click on “Edit” beside the “Watch Next TV and Movies” section.
Now, you can see the “Cross” icon in the center of each item. Click on it to remove the item and do the same for all the items you want to delete.
Once you removed the items you want from the “Watch Next TV and Movies” section, click on “Done.”
Open the Amazon Prime Video app.
Long press the item you want to remove from the “Watch Next TV and Movies” section.
Now, you can see the “Remove From List” option. Tap on it.
That is all, and the item is removed. You can repeat the above steps for all the items you want to delete.