Sign in to Netflix on a web browser
Go to your profile
Open the title you want to remove from Continue Watching
Start playing the title
Move the progress bar to the end so it is marked as watched
Or select the title from Continue Watching and choose Remove from Continue Watching if available
On mobile or TV, use the title’s options menu and select Remove from Row if shown
If the title still appears, wait a few minutes and refresh Netflix
Repeat for each title you want removed