Hi, I have had type 2 for 6 years and am on metformin (4 tablets per day). My question is that some mornings, especially if I have had "sweet" things the previous evening, I find that my lips feel very dry, but more importantly, I find my lips are full of gunge. When I wipe my lips on a tissue it doesn't look pleasant....could someone please explain. Should I keep off "sweet" things ? Thanks. Rara