Hi - I have grey highly polished porcelain tiles throughout the whole house and struggling to find the right cleaner that wont leave streak marks or water marks, had a Kärcher steam cleaner which was average but this has now blown up, had ordered the new FC3 and really disappointed that it left water on the surface which took an age t dry and then left water marks, does anyone have recommendations for a good steam or wet and dry cleaner that leaves it sparkling?