Cleaner against stubborn mineral dirt,
 Can be used on all acid and water-resistant surfaces such as glass, plastic, chrome, ceramics, stainless steel, toilets, acid-resistant tiles, painted surfaces, etc.
 very suitable as a basic cleaner  of sanitary facilities 
 removes lime, urine scale, water scale, saltpeter, salt efflorescence, oxide stains, rust and much more. 
 Kristhal recommendation against lime on glass: in addition with steel wool type 0000.