To delete comments, one have to be logged in while viewing the blog post whereupon there will be a trashcan icon
beside the comment. To delete the comment, all you need to do is to click on the trashcan icon However sometimes the trashcan icon is missing even when you are logged in which makes the task of deleting the comment impossible.
Today I found a Delete Blogger comment utility and tested it (obviously while I am not logged in because I don't really want to delete any comments). I found out that the utility will download all the comments together with all the accompanying trashcan icons
while logged out. I tested clicking on one of the trashcan icon while logged out and what happened was a Blogger log in page appeared with boxes to enter the username and password like the screenshot below:
