To delete comments left by your blog visitors follow the instructions below.
Step 1: Login to your account choose to edit the page which contains your blog.
Step 2: In your page editor view click on the blog so that it is selected.
Step 3: Click on the edit blog icon which appears when the blog is selected.
Step 4: Click on the title of the blog post which you would like to remove a comment from..
Step 5: Click the comments tab to display a list of the comments on your blog.
Step 6: Click the check box next to the comment or comments you would like to delete and then click the delete button.