You can, of course, brush them, however this will not last long. More radical means of plastic washer embedded between the half-loops.
There is another way to get rid of the squeak. You need to shorten rod one half loop and put the loop inside a steel bearing ball.
Recommend to read
THAN MARKING TREES?
To put digital markers on trees — work is necessary, but time consuming. We managed to make a simple device that allows you to quickly and accurately "print" a mark on the barrel....
HACKSAW-UNIVERSAL
Everyone is familiar with the hacksaw. She has to be young no technique, no home handyman. Firmly holding the canvas top frame, but it limits the possibilities of the instrument....
