Diabetes in most forms are caused by being unable to digest the sugars in milk and other dairy products. As an infant we produce lactase, an enzyme necessary to digest the massive amount of sugar in mothers milk. After weaning we are told that from that moment on we are considered to be calfs, and to be wetnursed by the cow. However, at some stage in our life after weaning, the production of lactase ceases, wit the result that we can't digest the milk sugars any more.
Insulin is not effective with undigested sugars. the brain (the biocomputer) keeps on triggering the pancreas to produce insulin, equally ineffective. In your case I would suggest an avoidance of all dairy products for the rest of your life. That means even little bits in tea or coffee. Check labels on foods to see if they contain dairy and if soo, avoid them like the plague.
Good luck
Kinergy