I, unfortunately, have the same problem when toasting bread myself. After a long period of trial and error I have finally come up with the ultimate toasting method. Now stick with me here because I had difficulty figuring it out. Once the is half way done toasting, flip the bread! its as simple as one, two, well just two. I hope this helps because I really wish someone had told me this ages ago. Good luck with any future toasting endeavors you may encounter.