I think staying AWAY from wax’s and the like is important. The SF’s are finished in a VERY high gloss...ANY ( and I do mean ANY) minor grit will mar the finish! Always use a microfiber cloth and I believe best to have it dry and obviously clean. The string grills are another question altogether??? I have never heard any recommendation that made sense on these. Frankly IMHO, the string grills are one stupid idea; although they do look good ( while they last).
