<p>Hello everyone,</p> <p>I have heard some mixed viewpoints on the "best" method to cleaning a lens, some say stay away from any type of chemical on the front element because of the coating, others say that cleaning solution does no harm to the front element at all. I recently cleaned my new lens with a lens cleaning product from a local store that was meant for cleaning camera lenses, as well as glasses etc, and I even checked the MSDS to ensure it was made with quality chemicals, which it was. I also purchased a Zeiss cleaning kit, which I then used to clean the lens again before a shoot, using the provided Zeiss cleaning solution. My method is quite simple, camel hair brush, microfiber towel, use a chemical wipe, then clean off the remaining solution with a different microfiber towel, the whole process usually takes about 45 minutes (mainly because I like to ensure that everything is off of the lens <em>entirely</em> before replacing the front filter).<br> It seems to have worked well, but now I am being told that chemicals damage the front coatings. Can anyone lend some advice here? Is this something I should be concerned with? I already use a lens filter on the front, but take it off sparingly to attach a Lee filter holder, and sometimes bump the front element, causing smudges and streaks. I never use my breath because I have been told that that also can damage the front element. </p> <p>The lens is a brand new Canon 24mm TS-E 3.5 L II if that matters at all... </p> <p>Any help and advice is much appreciated. </p> <p>Thank you all in advance! </p>