Don't use either. Your need to buy some Filter Cleaner and some Filter Oil.
I use Spectro stuff on the 749. I remove the filters and clean them in the laundry sink (its in a spray aerosol can). You then rinse them in warm water and allow to air dry or dry with paper towels. You then lighty re-oil the exterior face on the filter with filter oil (spray aerosol also) and allow to air dry for twenty minutes or so and reinstall.
Job done. Have a beer or two