I have seen the following items recommended for cleaning CBN wheels
(1) Anything you like
http://d-waytools.com/cbn-grinding-wheels
(2) Trend tool cleaner
http://www.cindydrozda.com/html/CBN.html
(3) Aluminium oxide stick
https://www.axminster.co.uk/cleaning...ne-400g-104143
(4)Trend lapping fluid , wd40, pencil eraser rubber
thoughts advice comments please