You can manage all recommendations by going to account > Your data in YouTube
From there you can remove the watch history and search history or disable them entirely. It should make it a lot easier to reset the recommendations.
This one looks exciting to use!
https://giphy.com/gifs/peacocktv-science-bill-nye-the-end-is-ZKDbv75FWjdC4cwSe7
You can manage all recommendations by going to account > Your data in YouTube
From there you can remove the watch history and search history or disable them entirely. It should make it a lot easier to reset the recommendations.