Have you got a can of GT85 with the supplied straw and a small screwdriver or something similar like a skewer? if so slide the screwdriver/skewer into the gap between the grips and the bars, put the straw onto the nozzle of the GT85 can, slide the straw in alongside the screwdriver and give it a couple of quick squirts. Repeat in a couple of other places and this will quickly free off the grips.