I do own a Kenko CPL fliter, so far the coating has not come off. But i think Lens Tissue is better know as a optical cloth? and best is you use a dust blower first to get rid of the dust,then use a optical cloth to clean if the dust persist on staying on yr filter. I don't really recommend using lens cleaning solution,as it might damage the coating of the filter. But thats me
I use kenko CPL always clean lens with blower follow by solution, I dont always clean my lens unless needed.
If you polish yr car too much is not a good thing too.
I Always blow the lens before cleaning and always use lens solution to remove dirt and finger print, didnt do dry cleaning. So far so good.