The official product page of EPHYON shows that the '500g Bathroom Mirror Anti-Fog and Descaling Agent' is a liquid specialized cleaning product available on the shelf, with a net content of 500g per bottle.
The white marks on bathroom surfaces do not all come from the same cause. According to the U.S. Geological Survey, water hardness is mainly related to calcium and magnesium compounds, and hard water may form scale; the UK Drinking Water Inspectorate also points out that hard water can leave streaks on sinks, bathtubs, and sanitary ware. The specific water quality of a household should still be checked with the local water supply authority and cannot be replaced by foreign classification standards.
The product description discloses that its uses include light limescale on surfaces such as bathroom mirrors, glass, tiles, and plastic showerheads, and distinguishes between 'spray and wipe' situations and more serious limescale that requires soaking. In actual use, the dosage, dwell time, wiping, and rinsing methods specified on the label of the product in hand should be followed, and the action time should not be extended on your own based on the article's summary.
Material assessment is more important than 'it all looks like glass.' The technical cleaning data from the Glass Association of America recommends testing on a small area first and checking for damage; coated, laminated, or decorative glass may have special restrictions and require following the instructions of the glass or bathroom fixture manufacturer. This data is for architectural glass and cannot replace the product label, but it can support the 'verify the surface first' approach.
The EPHYON product page clearly states: For acid-sensitive utensils, test in an inconspicuous area first, and only use normally if no damage occurs; children and pets must not come into contact with it, and those with sensitive skin should take protective measures. If the mirror surface shows crystallization or blurriness, the page indicates it may be due to ingredients not being wiped clean and should be cleaned using alternating wet and dry towels.
Cleaning product labels are the final operational boundary. Public materials from the American Cleaning Institute and the U.S. Environmental Protection Agency emphasize confirming where and how to use the product, warnings, storage, and disposal before use. They provide general safety principles, but for specific EPHYON products in the Chinese market, the batch Chinese label and the official website page shall prevail.
During daily cleaning, the issue can be divided into three steps: first, determine whether it is limescale, soap scum, or other stains; second, check the material and care requirements of the surface to be cleaned; third, follow the product label to control the amount used and the duration of application. For coated mirrors, natural stone, special metals, or surfaces of unknown material, you should first consult the manufacturer or perform a small test in an inconspicuous area.