It most certainly does something. I do it on a regular basis whenever I feel that the recommendations are getting too "fine tuned" and I want to have more broa

It most certainly does something. I do it on a regular basis whenever I feel that the recommendations are getting too "fine tuned" and I want to have more broad recommendations. If you are not seeing fully refreshed recommendations it's probably because you are still subscribed to channels or have liked videos or the other pieces of information that goes into recommendations.