I've been printing fine for a while, but over the last week, I've noticed that the perimeters and the top layers are not fusing. The first layer is fine. I'm using 1.75mm PLA, 210 C first layer, 200 subsequent layers. Bed 65 dropping to 60. Nozzle 0.3mm, layers 0.15mm. Two perimeters, three top and bottom. Bowden extruder, E3D hotend, layer cooling. Printing on glass with gluestick.
