We live in a quickly changing world and websites are one of the things that get updated more often. New functionality and features are added and removed, which in many cases affect what cookies are used by your website.
Cookies are not something you need to be worrying about when changing website functionality. This is why we have introduced Automatic monthly cookie scanning.
Since scanning website cookies requires actual visiting of every page and analyzing content, we perform automatic scanning during the night, when there are less visitors on the website thus reducing server load during cookie scanning.