Peter,
I don't know. I have a Hoya multi-coted filter (not sure it's the same series) and I use those lens cleaning fluid kits in it. Wasn't I supposed to? When I purchased the camera, lenses and filters at Calumet in London, I also bought the kit, so I would have expected them saying something if it wasn't adequate. It didn't occur to me it might not be.
Regards,
Adelaide