Why do opticians often advise against using cleaning cloths?
When they first came on the market, lens cleaning cloths often contained materials that could damage the lenses (e.g. tiny pieces of wood). This problem has since been resolved. ZEISS moistened cleaning wipes are made of micro-fine cellulose fibres, are gentle on your lenses, provide streak-free results and, most importantly, do not contain any other chemcial agents. Incidentally, they are also ideal for cleaning your smartphone or tablet display - all streak-free.