I am getting an annoying “chatter” (for lack of a better word) when the Y axis moves during prints. It does not happen when the bed is near the end of the Y travel (printing on the front of the bed) but when printing at the back of the bed it makes a rather loud racket. It only seems to make the noise when the bed is moving from the back to the front. Front to back is nice and quiet. The rods seem to be tight in the holders. If I lightly squeeze the smooth rods it will run quietly. Lulzbot says not to lube the rods as the bearings are self lubricating. I have cleaned and cleaned them but it does not help. Does anyone have any suggestions to quiet the bed travel? I am almost to the point of lubricating the rods. On the Ingus web site it says the bearings may be lubricated but it might lead to increased wear in dusty conditions but it will be worth it for some peace and quiet!