While it's easy to delete custom lists and titles within my watchlist, it appears impossible to delete a title from a custom list.  

0votes

I'm using desktop version and there's a bin/trash icon beside each entry in your custom list, see this

Sometimes it takes a few minutes for a custom list to update. Are you Saving it after you've made your changes?

Hi.  I think so.  Sorry for the delayed response.  Will make sure all changes are saved going forward.   Thanks!

Is there a way to delete it al in one click or do i need to delete everything piece for piece?

 pia.sels:

Is there a way to delete it al in one click or do i need to delete everything piece for piece?

If you mean "Custom List", the delete option will be available at the bottom once you click EDIT. This is on Desktop version not sure how it will work on App though.