How do I "de-duplicate" songs from BETWEEN playlists, efficiently and effectively?

[user-removed]

I'm a relative "newbie" when it comes to Spotify and how to use it, so please bear with me if this is in the wrong forum or just a stupid question. 

Having said that, I created a whole bunch of playlists with numerous songs on them, only to discover other (pre-made) playlists that I like even more.  How do I efficiently/effectively get rid of the DUPLICATE songs in the playlists I made without having to erase the other songs that I still want to keep?

[Alfredo]

Hey @user-removed!

Thanks for reaching out to the community.

You can sort or filter the playlists following these steps. You'll be able to easily find the duplicate songs and remove them from there.

It's easier if you do this using the desktop app, since you can just hold Ctrl and click all the duplicate songs and delete them quickly.

Let me know if this helps.