GewitzterThanas732 weeks ago000Can you also clean with clear water? Or must the cleaning agent always be used? If so, does it always have to be the original?Show in original language (German)Anonymous2 weeks ago • purchased this product000purchased this productOnly with clean water I think it works but not well. The liquid helps to remove dirt and avoid halos.A compatible liquid also works. Show in original language (Italian)CommentAnonymous2 weeks ago • purchased this product000purchased this productI don't know. I always use the original because I'm so happy with the result...Show in original language (German)Comment