Found a fix.
take the battery out make a slip of paper about half an inch wide and put some lubricant on it, preferably graphite, or silicate based. WD40 would work, but you may have to repeat this after a few months if you use it.
Figure out which side is making noise. Slip the paper in both directions all the while pressing the button up and down. Do this in different areas till the noise stops.
Seems to have been permanent for me. So far at least.