I have Shreddies and it works well (not the frosted ones obvs). Alternatively, have you tried fasting in the morning to ensure it's definitely the breakfast making you go high?
Sorry if it’s too late but I never comment on these so I thought I’d give it a go.
It looks like your bs has dropped in the night so your liver has released some glucose to counteract the drop, thus shooting you sky high! This was happening to me as I’m very active.
Have you tried to leave it to...