I am having adhesion problems (nobody else does, right?) and what I seem to see, is that when my prints are over a certain size the print skirts and rafts do not stick. At about 2x2" things have always worked fine, but now I am printing some 6 inch "hoops" and the rafts (and subsequent layers) dont stick. the same occurs with a 4x8" device. Measuring bed temperatures it is obvious that the bed is cooler near the edges by about 10C. (I am running PLA at 210C on a Creality ender 5). I have done some of the usual things-double checked leveling, slower speeds on the skirt layers etc but none work. SO I am looking a bit at the bed-I would think that it should heat evenly and I would assume a glass bed would to this. However some of the guides on the web are rather "vague" about this and the need for a glass bed, or even its adhesion capability seems questionable. They do of course give even surfaces.Anyone got experience with glass beds? CheersFritz