DubS You can try using spray grease like white Lithium, and spraying it into the seam where the upper bearing is. It will run down into the bearings. If that doesn’t help, then you will need to take the bearings out and repack them.
FluidFreeride has a really good video on it. It’s the original Burn E with the double lock collar, but the procedure is exactly the same as ours, save for the extra collar nut on the original E.
It’s a pain the the ass, but doable if you have patience and the correct tools.
That being said, my notch is really bad. If yours is minor, then try spraying Lithium grease.